# bfs.sys KB5055523 vs KB5058411 (CVE-2025-29970) # TOC * [Visual Chart Diff](#visual-chart-diff) * [Metadata](#metadata) * [Ghidra Diff Engine](#ghidra-diff-engine) * [Command Line](#command-line) * [Binary Metadata Diff](#binary-metadata-diff) * [Program Options](#program-options) * [Diff Stats](#diff-stats) * [Strings](#strings) * [Deleted](#deleted) * [Added](#added) * [BfsCloseRootDirectory](#bfscloserootdirectory) * [Feature_2777415992__private_IsEnabledDeviceUsageNoInline](#feature_2777415992__private_isenableddeviceusagenoinline) * [Feature_2777415992__private_IsEnabledFallback](#feature_2777415992__private_isenabledfallback) * [Modified](#modified) * [BfsCloseStorage](#bfsclosestorage) * [Modified (No Code Changes)](#modified-no-code-changes) * [wil_details_IsEnabledFallback](#wil_details_isenabledfallback) * [NTOSKRNL.EXE::ExFreePoolWithTag](#ntoskrnlexeexfreepoolwithtag) # Visual Chart Diff ```mermaid flowchart LR BfsCloseStorage-1-old<--Match 79%-->BfsCloseStorage-1-new subgraph bfs-10.0.26100.4061.sys BfsCloseStorage-1-new subgraph Added direction LR BfsCloseRootDirectory Feature_2777415992__private_IsEnabledDeviceUsageNoInline Feature_2777415992__private_IsEnabledFallback end end subgraph bfs-10.0.26100.3624.sys BfsCloseStorage-1-old end ``` ```mermaid pie showData title Function Matches - 99.6078% "unmatched_funcs_len" : 3 "matched_funcs_len" : 762 ``` ```mermaid pie showData title Matched Function Similarity - 99.6063% "matched_funcs_with_code_changes_len" : 1 "matched_funcs_with_non_code_changes_len" : 2 "matched_funcs_no_changes_len" : 759 ``` # Metadata ## Ghidra Diff Engine ### Command Line #### Captured Command Line ``` ghidriff --project-location C:\tools\hugo\patchpalooza\ghidriff\CVE-2025-29970\ghidra_projects --project-name CVE-2025-29970 --symbols-path C:\tools\hugo\patchpalooza\ghidriff\CVE-2025-29970\symbols --gzfs-path gzfs --threaded --log-level INFO --file-log-level INFO --log-path ghidriff.log --min-func-len 10 --gdt [] --bsim --max-ram-percent 60.0 --max-section-funcs 200 --md-title bfs.sys KB5055523 vs KB5058411 (CVE-2025-29970) bfs-10.0.26100.3624.sys bfs-10.0.26100.4061.sys ``` #### Verbose Args
``` --old ['C:\\tools\\hugo\\patchpalooza\\ghidriff\\CVE-2025-29970\\bfs-10.0.26100.3624.sys'] --new [['C:\\tools\\hugo\\patchpalooza\\ghidriff\\CVE-2025-29970\\bfs-10.0.26100.4061.sys']] --engine VersionTrackingDiff --output-path C:\tools\hugo\patchpalooza\ghidriff\CVE-2025-29970\output --summary False --project-location C:\tools\hugo\patchpalooza\ghidriff\CVE-2025-29970\ghidra_projects --project-name CVE-2025-29970 --symbols-path C:\tools\hugo\patchpalooza\ghidriff\CVE-2025-29970\symbols --gzfs-path gzfs --base-address None --program-options None --threaded True --force-analysis False --force-diff False --no-symbols False --log-level INFO --file-log-level INFO --log-path ghidriff.log --va False --min-func-len 10 --use-calling-counts False --gdt [] --bsim True --bsim-full False --max-ram-percent 60.0 --print-flags False --jvm-args None --side-by-side False --max-section-funcs 200 --md-title bfs.sys KB5055523 vs KB5058411 (CVE-2025-29970) ```
#### Download Original PEs ``` wget https://msdl.microsoft.com/download/symbols/Bfs.sys/7B2F938E20000/Bfs.sys -O bfs.sys.x64.10.0.26100.3624 wget https://msdl.microsoft.com/download/symbols/Bfs.sys/B0F1B29620000/Bfs.sys -O bfs.sys.x64.10.0.26100.4061 ``` ## Binary Metadata Diff ```diff --- bfs-10.0.26100.3624.sys Meta +++ bfs-10.0.26100.4061.sys Meta @@ -1,44 +1,44 @@ -Program Name: bfs-10.0.26100.3624.sys +Program Name: bfs-10.0.26100.4061.sys Language ID: x86:LE:64:default (4.7) Compiler ID: windows Processor: x86 Endian: Little Address Size: 64 Minimum Address: 1c0000000 Maximum Address: ff0000184f # of Bytes: 137296 # of Memory Blocks: 13 -# of Instructions: 17199 -# of Defined Data: 2659 -# of Functions: 381 -# of Symbols: 2798 +# of Instructions: 17252 +# of Defined Data: 2673 +# of Functions: 384 +# of Symbols: 2811 # of Data Types: 357 # of Data Type Categories: 22 Analyzed: true Compiler: visualstudio:unknown Created With Ghidra Version: 12.1.2 -Date Created: Sat Jul 25 10:16:14 SGT 2026 +Date Created: Sat Jul 25 10:16:21 SGT 2026 Executable Format: Portable Executable (PE) -Executable Location: /C:/tools/hugo/patchpalooza/ghidriff/CVE-2025-29970/bfs-10.0.26100.3624.sys -Executable MD5: df5d8572943f9d82b1a3f2746f93a8d9 -Executable SHA256: c5201a16844fba06d03dd2aa91ae9ba723a7073cea37ef3cc74c5f080c39ac50 -FSRL: file:///C:/tools/hugo/patchpalooza/ghidriff/CVE-2025-29970/bfs-10.0.26100.3624.sys?MD5=df5d8572943f9d82b1a3f2746f93a8d9 +Executable Location: /C:/tools/hugo/patchpalooza/ghidriff/CVE-2025-29970/bfs-10.0.26100.4061.sys +Executable MD5: ffacf274c12553b1257c847b9cded652 +Executable SHA256: ac8ec89b1881e44abb5618e8c3a35881426dbfe56e3d22c0f839514abd044537 +FSRL: file:///C:/tools/hugo/patchpalooza/ghidriff/CVE-2025-29970/bfs-10.0.26100.4061.sys?MD5=ffacf274c12553b1257c847b9cded652 PDB Age: 1 PDB File: bfs.pdb -PDB GUID: 8a9551ed-cabb-a02f-f5c5-35b22299d610 +PDB GUID: 47daa440-1b06-93d7-c466-b404e82fac8f PDB Loaded: true PDB Version: RSDS PE Property[CompanyName]: Microsoft Corporation PE Property[FileDescription]: Bfs Filter Driver -PE Property[FileVersion]: 10.0.26100.3624 (WinBuild.160101.0800) +PE Property[FileVersion]: 10.0.26100.4061 (WinBuild.160101.0800) PE Property[InternalName]: Bfs.sys PE Property[LegalCopyright]: © Microsoft Corporation. All rights reserved. PE Property[OriginalFilename]: Bfs.sys PE Property[ProductName]: Microsoft® Windows® Operating System -PE Property[ProductVersion]: 10.0.26100.3624 +PE Property[ProductVersion]: 10.0.26100.4061 PE Property[Translation]: 4b00409 Preferred Root Namespace Category: RTTI Found: false Relocatable: true SectionAlignment: 4096 Should Ask To Analyze: false ``` ## Program Options
Ghidra bfs-10.0.26100.3624.sys Decompiler Options |Decompiler Option|Value| | :---: | :---: | |Prototype Evaluation|__fastcall|
Ghidra bfs-10.0.26100.3624.sys Specification extensions Options |Specification extensions Option|Value| | :---: | :---: | |FormatVersion|0| |VersionCounter|0|
Ghidra bfs-10.0.26100.3624.sys Analyzers Options |Analyzers Option|Value| | :---: | :---: | |ASCII Strings|true| |ASCII Strings.Create Strings Containing Existing Strings|true| |ASCII Strings.Create Strings Containing References|true| |ASCII Strings.Force Model Reload|false| |ASCII Strings.Minimum String Length|LEN_5| |ASCII Strings.Model File|StringModel.sng| |ASCII Strings.Require Null Termination for String|true| |ASCII Strings.Search Only in Accessible Memory Blocks|true| |ASCII Strings.String Start Alignment|ALIGN_1| |ASCII Strings.String end alignment|4| |Aggressive Instruction Finder|false| |Aggressive Instruction Finder.Create Analysis Bookmarks|true| |Apply Data Archives|true| |Apply Data Archives.Archive Chooser|[Auto-Detect]| |Apply Data Archives.Create Analysis Bookmarks|true| |Apply Data Archives.GDT User File Archive Path|None| |Apply Data Archives.User Project Archive Path|None| |Call Convention ID|true| |Call Convention ID.Analysis Decompiler Timeout (sec)|60| |Call-Fixup Installer|true| |Condense Filler Bytes|false| |Condense Filler Bytes.Filler Value|Auto| |Condense Filler Bytes.Minimum number of sequential bytes|1| |Create Address Tables|true| |Create Address Tables.Allow Offcut References|false| |Create Address Tables.Auto Label Table|false| |Create Address Tables.Create Analysis Bookmarks|true| |Create Address Tables.Maxmimum Pointer Distance|16777215| |Create Address Tables.Minimum Pointer Address|4132| |Create Address Tables.Minimum Table Size|2| |Create Address Tables.Pointer Alignment|1| |Create Address Tables.Relocation Table Guide|true| |Create Address Tables.Table Alignment|4| |Data Reference|true| |Data Reference.Address Table Alignment|1| |Data Reference.Address Table Minimum Size|2| |Data Reference.Align End of Strings|false| |Data Reference.Ascii String References|true| |Data Reference.Create Address Tables|true| |Data Reference.Minimum String Length|5| |Data Reference.References to Pointers|true| |Data Reference.Relocation Table Guide|true| |Data Reference.Respect Execute Flag|true| |Data Reference.Subroutine References|true| |Data Reference.Switch Table References|false| |Data Reference.Unicode String References|true| |Decompiler Parameter ID|true| |Decompiler Parameter ID.Analysis Clear Level|ANALYSIS| |Decompiler Parameter ID.Analysis Decompiler Timeout (sec)|60| |Decompiler Parameter ID.Commit Data Types|true| |Decompiler Parameter ID.Commit Void Return Values|false| |Decompiler Parameter ID.Prototype Evaluation|__fastcall| |Decompiler Switch Analysis|true| |Decompiler Switch Analysis.Analysis Decompiler Timeout (sec)|60| |Demangler Microsoft|true| |Demangler Microsoft.msdApplyOptions|{ interpretation: FUNCTION_IF_EXISTS, applyCallingConvention: true, applySignature: true, demangleOnlyKnownPatterns: true, doDisassembly: true }| |Demangler Microsoft.msdOutputOptions|ghidra.app.util.demangler.microsoft.options.MsdOutputOption@9e5b| |Disassemble Entry Points|true| |Disassemble Entry Points.Respect Execute Flag|true| |Embedded Media|true| |Embedded Media.Create Analysis Bookmarks|true| |External Entry References|true| |Function ID|true| |Function ID.Always Apply FID Labels|false| |Function ID.Create Analysis Bookmarks|true| |Function ID.Instruction Count Threshold|14.6| |Function ID.Multiple Match Threshold|30.0| |Function Start Search|true| |Function Start Search.Bookmark Functions|false| |Function Start Search.Search Data Blocks|false| |Non-Returning Functions - Discovered|true| |Non-Returning Functions - Discovered.Create Analysis Bookmarks|true| |Non-Returning Functions - Discovered.Function Non-return Threshold|3| |Non-Returning Functions - Discovered.Repair Flow Damage|true| |Non-Returning Functions - Known|true| |Non-Returning Functions - Known.Create Analysis Bookmarks|true| |PDB MSDIA|false| |PDB MSDIA.Search untrusted symbol servers|false| |PDB Universal|true| |PDB Universal.Import Source Line Info|true| |PDB Universal.Search untrusted symbol servers|false| |Reference|true| |Reference.Address Table Alignment|1| |Reference.Address Table Minimum Size|2| |Reference.Align End of Strings|false| |Reference.Ascii String References|true| |Reference.Create Address Tables|true| |Reference.Minimum String Length|5| |Reference.References to Pointers|true| |Reference.Relocation Table Guide|true| |Reference.Respect Execute Flag|true| |Reference.Subroutine References|true| |Reference.Switch Table References|false| |Reference.Unicode String References|true| |Scalar Operand References|true| |Scalar Operand References.Relocation Table Guide|true| |Shared Return Calls|true| |Shared Return Calls.Allow Conditional Jumps|false| |Shared Return Calls.Assume Contiguous Functions Only|true| |Stack|true| |Stack.Create Local Variables|true| |Stack.Create Param Variables|false| |Stack.Max Threads|2| |Subroutine References|true| |Subroutine References.Create Thunks Early|true| |Variadic Function Signature Override|false| |Variadic Function Signature Override.Create Analysis Bookmarks|false| |Windows x86 PE Exception Handling|true| |Windows x86 PE RTTI Analyzer|true| |Windows x86 Thread Environment Block (TEB) Analyzer|true| |Windows x86 Thread Environment Block (TEB) Analyzer.Starting Address of the TEB|| |Windows x86 Thread Environment Block (TEB) Analyzer.Windows OS Version|Windows 7| |WindowsPE x86 Propagate External Parameters|false| |WindowsResourceReference|true| |WindowsResourceReference.Create Analysis Bookmarks|true| |x86 Constant Reference Analyzer|true| |x86 Constant Reference Analyzer.Create Data from pointer|false| |x86 Constant Reference Analyzer.Function parameter/return Pointer analysis|true| |x86 Constant Reference Analyzer.Max Threads|2| |x86 Constant Reference Analyzer.Min absolute reference|4| |x86 Constant Reference Analyzer.Require pointer param data type|false| |x86 Constant Reference Analyzer.Speculative reference max|256| |x86 Constant Reference Analyzer.Speculative reference min|1024| |x86 Constant Reference Analyzer.Stored Value Pointer analysis|true| |x86 Constant Reference Analyzer.Trust values read from writable memory|true|
Ghidra bfs-10.0.26100.4061.sys Decompiler Options |Decompiler Option|Value| | :---: | :---: | |Prototype Evaluation|__fastcall|
Ghidra bfs-10.0.26100.4061.sys Specification extensions Options |Specification extensions Option|Value| | :---: | :---: | |FormatVersion|0| |VersionCounter|0|
Ghidra bfs-10.0.26100.4061.sys Analyzers Options |Analyzers Option|Value| | :---: | :---: | |ASCII Strings|true| |ASCII Strings.Create Strings Containing Existing Strings|true| |ASCII Strings.Create Strings Containing References|true| |ASCII Strings.Force Model Reload|false| |ASCII Strings.Minimum String Length|LEN_5| |ASCII Strings.Model File|StringModel.sng| |ASCII Strings.Require Null Termination for String|true| |ASCII Strings.Search Only in Accessible Memory Blocks|true| |ASCII Strings.String Start Alignment|ALIGN_1| |ASCII Strings.String end alignment|4| |Aggressive Instruction Finder|false| |Aggressive Instruction Finder.Create Analysis Bookmarks|true| |Apply Data Archives|true| |Apply Data Archives.Archive Chooser|[Auto-Detect]| |Apply Data Archives.Create Analysis Bookmarks|true| |Apply Data Archives.GDT User File Archive Path|None| |Apply Data Archives.User Project Archive Path|None| |Call Convention ID|true| |Call Convention ID.Analysis Decompiler Timeout (sec)|60| |Call-Fixup Installer|true| |Condense Filler Bytes|false| |Condense Filler Bytes.Filler Value|Auto| |Condense Filler Bytes.Minimum number of sequential bytes|1| |Create Address Tables|true| |Create Address Tables.Allow Offcut References|false| |Create Address Tables.Auto Label Table|false| |Create Address Tables.Create Analysis Bookmarks|true| |Create Address Tables.Maxmimum Pointer Distance|16777215| |Create Address Tables.Minimum Pointer Address|4132| |Create Address Tables.Minimum Table Size|2| |Create Address Tables.Pointer Alignment|1| |Create Address Tables.Relocation Table Guide|true| |Create Address Tables.Table Alignment|4| |Data Reference|true| |Data Reference.Address Table Alignment|1| |Data Reference.Address Table Minimum Size|2| |Data Reference.Align End of Strings|false| |Data Reference.Ascii String References|true| |Data Reference.Create Address Tables|true| |Data Reference.Minimum String Length|5| |Data Reference.References to Pointers|true| |Data Reference.Relocation Table Guide|true| |Data Reference.Respect Execute Flag|true| |Data Reference.Subroutine References|true| |Data Reference.Switch Table References|false| |Data Reference.Unicode String References|true| |Decompiler Parameter ID|true| |Decompiler Parameter ID.Analysis Clear Level|ANALYSIS| |Decompiler Parameter ID.Analysis Decompiler Timeout (sec)|60| |Decompiler Parameter ID.Commit Data Types|true| |Decompiler Parameter ID.Commit Void Return Values|false| |Decompiler Parameter ID.Prototype Evaluation|__fastcall| |Decompiler Switch Analysis|true| |Decompiler Switch Analysis.Analysis Decompiler Timeout (sec)|60| |Demangler Microsoft|true| |Demangler Microsoft.msdApplyOptions|{ interpretation: FUNCTION_IF_EXISTS, applyCallingConvention: true, applySignature: true, demangleOnlyKnownPatterns: true, doDisassembly: true }| |Demangler Microsoft.msdOutputOptions|ghidra.app.util.demangler.microsoft.options.MsdOutputOption@9e5b| |Disassemble Entry Points|true| |Disassemble Entry Points.Respect Execute Flag|true| |Embedded Media|true| |Embedded Media.Create Analysis Bookmarks|true| |External Entry References|true| |Function ID|true| |Function ID.Always Apply FID Labels|false| |Function ID.Create Analysis Bookmarks|true| |Function ID.Instruction Count Threshold|14.6| |Function ID.Multiple Match Threshold|30.0| |Function Start Search|true| |Function Start Search.Bookmark Functions|false| |Function Start Search.Search Data Blocks|false| |Non-Returning Functions - Discovered|true| |Non-Returning Functions - Discovered.Create Analysis Bookmarks|true| |Non-Returning Functions - Discovered.Function Non-return Threshold|3| |Non-Returning Functions - Discovered.Repair Flow Damage|true| |Non-Returning Functions - Known|true| |Non-Returning Functions - Known.Create Analysis Bookmarks|true| |PDB MSDIA|false| |PDB MSDIA.Search untrusted symbol servers|false| |PDB Universal|true| |PDB Universal.Import Source Line Info|true| |PDB Universal.Search untrusted symbol servers|false| |Reference|true| |Reference.Address Table Alignment|1| |Reference.Address Table Minimum Size|2| |Reference.Align End of Strings|false| |Reference.Ascii String References|true| |Reference.Create Address Tables|true| |Reference.Minimum String Length|5| |Reference.References to Pointers|true| |Reference.Relocation Table Guide|true| |Reference.Respect Execute Flag|true| |Reference.Subroutine References|true| |Reference.Switch Table References|false| |Reference.Unicode String References|true| |Scalar Operand References|true| |Scalar Operand References.Relocation Table Guide|true| |Shared Return Calls|true| |Shared Return Calls.Allow Conditional Jumps|false| |Shared Return Calls.Assume Contiguous Functions Only|true| |Stack|true| |Stack.Create Local Variables|true| |Stack.Create Param Variables|false| |Stack.Max Threads|2| |Subroutine References|true| |Subroutine References.Create Thunks Early|true| |Variadic Function Signature Override|false| |Variadic Function Signature Override.Create Analysis Bookmarks|false| |Windows x86 PE Exception Handling|true| |Windows x86 PE RTTI Analyzer|true| |Windows x86 Thread Environment Block (TEB) Analyzer|true| |Windows x86 Thread Environment Block (TEB) Analyzer.Starting Address of the TEB|| |Windows x86 Thread Environment Block (TEB) Analyzer.Windows OS Version|Windows 7| |WindowsPE x86 Propagate External Parameters|false| |WindowsResourceReference|true| |WindowsResourceReference.Create Analysis Bookmarks|true| |x86 Constant Reference Analyzer|true| |x86 Constant Reference Analyzer.Create Data from pointer|false| |x86 Constant Reference Analyzer.Function parameter/return Pointer analysis|true| |x86 Constant Reference Analyzer.Max Threads|2| |x86 Constant Reference Analyzer.Min absolute reference|4| |x86 Constant Reference Analyzer.Require pointer param data type|false| |x86 Constant Reference Analyzer.Speculative reference max|256| |x86 Constant Reference Analyzer.Speculative reference min|1024| |x86 Constant Reference Analyzer.Stored Value Pointer analysis|true| |x86 Constant Reference Analyzer.Trust values read from writable memory|true|
## Diff Stats |Stat|Value| | :---: | :---: | |added_funcs_len|3| |deleted_funcs_len|0| |modified_funcs_len|3| |added_symbols_len|3| |deleted_symbols_len|0| |diff_time|15.128049850463867| |deleted_strings_len|0| |added_strings_len|0| |match_types|Counter({'SymbolsHash': 380, 'ExternalsName': 185})| |items_to_process|9| |diff_types|Counter({'refcount': 2, 'calling': 2, 'code': 1, 'length': 1, 'address': 1, 'called': 1})| |unmatched_funcs_len|3| |total_funcs_len|765| |matched_funcs_len|762| |matched_funcs_with_code_changes_len|1| |matched_funcs_with_non_code_changes_len|2| |matched_funcs_no_changes_len|759| |match_func_similarity_percent|99.6063%| |func_match_overall_percent|99.6078%| |first_matches|Counter({'SymbolsHash': 380})| ```mermaid pie showData title All Matches "SymbolsHash" : 380 "ExternalsName" : 185 ``` ```mermaid pie showData title First Matches "SymbolsHash" : 380 ``` ```mermaid pie showData title Diff Stats "added_funcs_len" : 3 "deleted_funcs_len" : 0 "modified_funcs_len" : 3 ``` ```mermaid pie showData title Symbols "added_symbols_len" : 3 "deleted_symbols_len" : 0 ``` ## Strings *No string differences found* # Deleted # Added ## BfsCloseRootDirectory ### Function Meta |Key|bfs-10.0.26100.4061.sys| | :---: | :---: | |name|BfsCloseRootDirectory| |fullname|BfsCloseRootDirectory| |refcount|2| |length|221| |called|Feature_2777415992__private_IsEnabledDeviceUsageNoInline
NTOSKRNL.EXE::ExFreePoolWithTag| |calling|BfsCloseStorage| |paramcount|1| |address|1c000e23c| |sig|undefined __fastcall BfsCloseRootDirectory(longlong param_1)| |sym_type|Function| |sym_source|IMPORTED| |external|False| ```diff --- BfsCloseRootDirectory +++ BfsCloseRootDirectory @@ -0,0 +1,50 @@ + +void BfsCloseRootDirectory(longlong param_1) + +{ + longlong *plVar1; + longlong *plVar2; + longlong lVar3; + code *pcVar4; + ulonglong uVar5; + undefined1 *puVar6; + undefined1 auStack_28 [8]; + undefined1 auStack_20 [24]; + + puVar6 = auStack_28; + plVar1 = *(longlong **)(param_1 + 0x40); + uVar5 = Feature_2777415992__private_IsEnabledDeviceUsageNoInline(); + if ((int)uVar5 == 0) { + while( true ) { + plVar2 = (longlong *)*plVar1; + if (plVar2 == plVar1) { + return; + } + if (((longlong *)plVar2[1] != plVar1) || + (lVar3 = *plVar2, (longlong *)*(longlong *)(lVar3 + 8) != plVar2)) break; + *plVar1 = lVar3; + *(longlong **)(lVar3 + 8) = plVar1; + ExFreePoolWithTag(plVar2[2]); + ExFreePoolWithTag(plVar2); + ExFreePoolWithTag(plVar1); + } +LAB_1c000e2f6: + pcVar4 = (code *)swi(0x29); + (*pcVar4)(3); + puVar6 = auStack_20; + } + else { + while (plVar2 = (longlong *)*plVar1, plVar2 != plVar1) { + if (((longlong *)plVar2[1] != plVar1) || + (lVar3 = *plVar2, *(longlong **)(lVar3 + 8) != plVar2)) goto LAB_1c000e2f6; + *plVar1 = lVar3; + *(longlong **)(lVar3 + 8) = plVar1; + ExFreePoolWithTag(plVar2[2],0); + ExFreePoolWithTag(plVar2); + } + } + *(undefined8 *)(puVar6 + -8) = 0x1c000e309; + ExFreePoolWithTag(plVar1,0); + return; +} + ``` ## Feature_2777415992__private_IsEnabledDeviceUsageNoInline ### Function Meta |Key|bfs-10.0.26100.4061.sys| | :---: | :---: | |name|Feature_2777415992__private_IsEnabledDeviceUsageNoInline| |fullname|Feature_2777415992__private_IsEnabledDeviceUsageNoInline| |refcount|2| |length|49| |called|Feature_2777415992__private_IsEnabledFallback| |calling|BfsCloseRootDirectory| |paramcount|0| |address|1c00100d8| |sig|ulonglong __fastcall Feature_2777415992__private_IsEnabledDeviceUsageNoInline(void)| |sym_type|Function| |sym_source|IMPORTED| |external|False| ```diff --- Feature_2777415992__private_IsEnabledDeviceUsageNoInline +++ Feature_2777415992__private_IsEnabledDeviceUsageNoInline @@ -0,0 +1,17 @@ + +ulonglong Feature_2777415992__private_IsEnabledDeviceUsageNoInline(void) + +{ + ulonglong uVar1; + undefined8 local_res8; + + local_res8 = (ulonglong)Feature_2777415992__private_featureState; + if ((Feature_2777415992__private_featureState & 0x10) == 0) { + uVar1 = Feature_2777415992__private_IsEnabledFallback(local_res8,3); + } + else { + uVar1 = (ulonglong)(Feature_2777415992__private_featureState & 1); + } + return uVar1; +} + ``` ## Feature_2777415992__private_IsEnabledFallback ### Function Meta |Key|bfs-10.0.26100.4061.sys| | :---: | :---: | |name|Feature_2777415992__private_IsEnabledFallback| |fullname|Feature_2777415992__private_IsEnabledFallback| |refcount|2| |length|21| |called|wil_details_IsEnabledFallback| |calling|Feature_2777415992__private_IsEnabledDeviceUsageNoInline| |paramcount|2| |address|1c0010110| |sig|undefined __fastcall Feature_2777415992__private_IsEnabledFallback(ulonglong param_1, int param_2)| |sym_type|Function| |sym_source|IMPORTED| |external|False| ```diff --- Feature_2777415992__private_IsEnabledFallback +++ Feature_2777415992__private_IsEnabledFallback @@ -0,0 +1,8 @@ + +void Feature_2777415992__private_IsEnabledFallback(ulonglong param_1,int param_2) + +{ + wil_details_IsEnabledFallback(param_1,param_2,&Feature_2777415992__private_descriptor); + return; +} + ``` # Modified *Modified functions contain code changes* ## BfsCloseStorage ### Match Info |Key|bfs-10.0.26100.3624.sys - bfs-10.0.26100.4061.sys| | :---: | :---: | |diff_type|code,length,address,called| |ratio|0.29| |i_ratio|0.68| |m_ratio|0.82| |b_ratio|0.79| |match_types|SymbolsHash| ### Function Meta Diff |Key|bfs-10.0.26100.3624.sys|bfs-10.0.26100.4061.sys| | :---: | :---: | :---: | |name|BfsCloseStorage|BfsCloseStorage| |fullname|BfsCloseStorage|BfsCloseStorage| |refcount|4|4| |`length`|299|212| |`called`|BfsDereferenceTableEntry
FLTMGR.SYS::FltClose
NTOSKRNL.EXE::ExFreePoolWithTag
NTOSKRNL.EXE::RtlEnumerateGenericTableAvl
NTOSKRNL.EXE::RtlIsGenericTableEmptyAvl|BfsCloseRootDirectory
BfsDereferenceTableEntry
FLTMGR.SYS::FltClose
NTOSKRNL.EXE::ExFreePoolWithTag
NTOSKRNL.EXE::RtlEnumerateGenericTableAvl
NTOSKRNL.EXE::RtlIsGenericTableEmptyAvl| |calling|BfsDereferencePolicyEntryEx
BfsLoadUserPolicyEntriesToGlobalFileTable|BfsDereferencePolicyEntryEx
BfsLoadUserPolicyEntriesToGlobalFileTable| |paramcount|1|1| |`address`|1c000e23c|1c000e320| |sig|undefined __fastcall BfsCloseStorage(longlong param_1)|undefined __fastcall BfsCloseStorage(longlong param_1)| |sym_type|Function|Function| |sym_source|IMPORTED|IMPORTED| |external|False|False| ### BfsCloseStorage Called Diff ```diff --- BfsCloseStorage called +++ BfsCloseStorage called @@ -0,0 +1 @@ +BfsCloseRootDirectory ``` ### BfsCloseStorage Diff ```diff --- BfsCloseStorage +++ BfsCloseStorage @@ -1,66 +1,36 @@ void BfsCloseStorage(longlong param_1) { - longlong *plVar1; - longlong *plVar2; - longlong lVar3; - code *pcVar4; - char cVar5; - undefined8 *puVar6; - undefined8 *puVar7; - undefined1 *puVar8; - undefined1 auStack_28 [8]; - undefined1 auStack_20 [24]; + char cVar1; + undefined8 *puVar2; + undefined8 *puVar3; - puVar8 = auStack_28; if (*(longlong *)(param_1 + 8) != 0) { FltClose(); } if (*(longlong *)(param_1 + 0x10) != 0) { ExFreePoolWithTag(*(longlong *)(param_1 + 0x10),0); } - plVar1 = *(longlong **)(param_1 + 0x40); + BfsCloseRootDirectory(param_1); + puVar3 = (undefined8 *)(param_1 + 0x50); do { - plVar2 = (longlong *)*plVar1; - if (plVar2 == plVar1) { -LAB_0: - puVar7 = (undefined8 *)(param_1 + 0x50); - do { - *(undefined8 *)(puVar8 + -8) = 0x1c000e2f6; - puVar6 = (undefined8 *)RtlEnumerateGenericTableAvl(puVar7,1); - if (puVar6 == (undefined8 *)0x0) { - if (puVar7 == (undefined8 *)(param_1 + 0x50)) { - *(undefined8 *)(puVar8 + -8) = 0x1c000e347; - ExFreePoolWithTag(param_1,0); - return; - } - puVar6 = puVar7 + -5; - puVar7 = (undefined8 *)(puVar7[0xd] + 0x20); - } - *(undefined8 *)(puVar8 + -8) = 0x1c000e322; - cVar5 = RtlIsGenericTableEmptyAvl(puVar6 + 5); - if (cVar5 == '\0') { - puVar7 = puVar6 + 5; - } - else { - *(undefined8 *)(puVar8 + -8) = 0x1c000e333; - BfsDereferenceTableEntry(puVar6); - } - } while( true ); + puVar2 = (undefined8 *)RtlEnumerateGenericTableAvl(puVar3,1); + if (puVar2 == (undefined8 *)0x0) { + if (puVar3 == (undefined8 *)(param_1 + 0x50)) { + ExFreePoolWithTag(param_1,0); + return; + } + puVar2 = puVar3 + -5; + puVar3 = (undefined8 *)(puVar3[0xd] + 0x20); } - if (((longlong *)plVar2[1] != plVar1) || - (lVar3 = *plVar2, (longlong *)*(longlong *)(lVar3 + 8) != plVar2)) { - pcVar4 = (code *)swi(0x29); - (*pcVar4)(3); - puVar8 = auStack_20; - goto LAB_0; + cVar1 = RtlIsGenericTableEmptyAvl(puVar2 + 5); + if (cVar1 == '\0') { + puVar3 = puVar2 + 5; } - *plVar1 = lVar3; - *(longlong **)(lVar3 + 8) = plVar1; - ExFreePoolWithTag(plVar2[2],0); - ExFreePoolWithTag(plVar2); - ExFreePoolWithTag(plVar1); + else { + BfsDereferenceTableEntry(puVar2); + } } while( true ); } ``` # Modified (No Code Changes) *Slightly modified functions have no code changes, rather differnces in:* - refcount - length - called - calling - name - fullname ## wil_details_IsEnabledFallback ### Match Info |Key|bfs-10.0.26100.3624.sys - bfs-10.0.26100.4061.sys| | :---: | :---: | |diff_type|refcount,calling| |ratio|1.0| |i_ratio|1.0| |m_ratio|1.0| |b_ratio|1.0| |match_types|SymbolsHash| ### Function Meta Diff |Key|bfs-10.0.26100.3624.sys|bfs-10.0.26100.4061.sys| | :---: | :---: | :---: | |name|wil_details_IsEnabledFallback|wil_details_IsEnabledFallback| |fullname|wil_details_IsEnabledFallback|wil_details_IsEnabledFallback| |`refcount`|4|5| |length|140|140| |called|wil_details_FeatureReporting_ReportUsageToService
wil_details_FeatureStateCache_ReevaluateCachedFeatureEnabledState
wil_details_FeatureStateCache_TryEnableDeviceUsageFastPath|wil_details_FeatureReporting_ReportUsageToService
wil_details_FeatureStateCache_ReevaluateCachedFeatureEnabledState
wil_details_FeatureStateCache_TryEnableDeviceUsageFastPath| |`calling`|Feature_752421176__private_IsEnabledFallback
Feature_AppSiloEnumeratePolicyCheck__private_IsEnabledFallback
Feature_Servicing_BfsGAFeature__private_IsEnabledFallback|Feature_2777415992__private_IsEnabledFallback
Feature_752421176__private_IsEnabledFallback
Feature_AppSiloEnumeratePolicyCheck__private_IsEnabledFallback
Feature_Servicing_BfsGAFeature__private_IsEnabledFallback| |paramcount|3|3| |address|1c0003ff8|1c0003ff8| |sig|uint __fastcall wil_details_IsEnabledFallback(ulonglong param_1, int param_2, undefined8 * param_3)|uint __fastcall wil_details_IsEnabledFallback(ulonglong param_1, int param_2, undefined8 * param_3)| |sym_type|Function|Function| |sym_source|IMPORTED|IMPORTED| |external|False|False| ### wil_details_IsEnabledFallback Calling Diff ```diff --- wil_details_IsEnabledFallback calling +++ wil_details_IsEnabledFallback calling @@ -0,0 +1 @@ +Feature_2777415992__private_IsEnabledFallback ``` ## NTOSKRNL.EXE::ExFreePoolWithTag ### Match Info |Key|bfs-10.0.26100.3624.sys - bfs-10.0.26100.4061.sys| | :---: | :---: | |diff_type|refcount,calling| |ratio|1.0| |i_ratio|1.0| |m_ratio|1.0| |b_ratio|1.0| |match_types|SymbolsHash,ExternalsName| ### Function Meta Diff |Key|bfs-10.0.26100.3624.sys|bfs-10.0.26100.4061.sys| | :---: | :---: | :---: | |name|ExFreePoolWithTag|ExFreePoolWithTag| |fullname|NTOSKRNL.EXE::ExFreePoolWithTag|NTOSKRNL.EXE::ExFreePoolWithTag| |`refcount`|142|145| |length|0|0| |called||| |`calling`|
Expand for full list:
BfsAccessRegistryKeyAsUserCallback
BfsAdjustRegistryKeySecurity
BfsCalculateRegistryPrefix
BfsCheckAndApplyPolicy
BfsClearGlobalFileEntry
BfsCloseStorage
BfsCreateDirectory
BfsCreateGlobalFileEntry
BfsCreatePolicyStorageDescriptor
BfsCreateStorage
BfsDeleteFileFromGlobalFileTableBfsDereferencePolicyEntryEx
BfsDereferenceTableEntry
BfsEnumeratePolicy
BfsExpandDirectory
BfsFreeDirectoryBlockList
BfsFreeTableEntry
BfsGetRegistryPrefix
BfsInitializeBootDevice
BfsInitializeGlobalFileTable
BfsInitializePipeMappingTable
BfsInitializePolicyTable
BfsInsertDirectory
BfsInsertDirectoryEntry
BfsInsertNamedPipeMapping
BfsInsertNotPresentPolicyEntry
BfsInsertPolicyEntry
BfsLoadUserPolicyEntriesToGlobalFileTable
BfsOpenRootDirectory
BfsPerformPrompt
BfsPolicyEntryExists
BfsPostCreateOperation
BfsPostCreatePipeOperation
BfsPreCreateOperation
BfsPreCreatePipeOperation
BfsProcessDeletePolicyEntryRequest
BfsProcessQueryPolicyRequest
BfsProcessQueryPolicySizeRequest
BfsProcessSetPolicyRequest
BfsReadDeleteThresholdFromRegistry
BfsRedirectNamedPipe
BfsRegistryPostCreateCallback
BfsReleaseNamedPipeMapping
BfsRemoveAllPoliciesFromGlobalFileTable
BfsRemoveKeyValues
BfsRemovePolicyFromGlobalFileTable
BfsReparseNamedPipe
BfsUninitializeGlobalFileTable
BfsUninitializePipeMappingTable
BfsUninitializePolicyTable
BfsUnload
BfsUpdateGlobalFilePolicy
BfsUpdatePolicySecurity
BfsUpdateUserPolicyDirectorySecurity
BfsVerifyPolicySecurity
BfsVerifyVolumeRootDescriptor
DriverEntry
KappxParsePackageFullNameFromToken
MIDL_user_free
|
Expand for full list:
BfsAccessRegistryKeyAsUserCallback
BfsAdjustRegistryKeySecurity
BfsCalculateRegistryPrefix
BfsCheckAndApplyPolicy
BfsClearGlobalFileEntry
BfsCloseRootDirectory
BfsCloseStorage
BfsCreateDirectory
BfsCreateGlobalFileEntry
BfsCreatePolicyStorageDescriptor
BfsCreateStorageBfsDeleteFileFromGlobalFileTable
BfsDereferencePolicyEntryEx
BfsDereferenceTableEntry
BfsEnumeratePolicy
BfsExpandDirectory
BfsFreeDirectoryBlockList
BfsFreeTableEntry
BfsGetRegistryPrefix
BfsInitializeBootDevice
BfsInitializeGlobalFileTable
BfsInitializePipeMappingTable
BfsInitializePolicyTable
BfsInsertDirectory
BfsInsertDirectoryEntry
BfsInsertNamedPipeMapping
BfsInsertNotPresentPolicyEntry
BfsInsertPolicyEntry
BfsLoadUserPolicyEntriesToGlobalFileTable
BfsOpenRootDirectory
BfsPerformPrompt
BfsPolicyEntryExists
BfsPostCreateOperation
BfsPostCreatePipeOperation
BfsPreCreateOperation
BfsPreCreatePipeOperation
BfsProcessDeletePolicyEntryRequest
BfsProcessQueryPolicyRequest
BfsProcessQueryPolicySizeRequest
BfsProcessSetPolicyRequest
BfsReadDeleteThresholdFromRegistry
BfsRedirectNamedPipe
BfsRegistryPostCreateCallback
BfsReleaseNamedPipeMapping
BfsRemoveAllPoliciesFromGlobalFileTable
BfsRemoveKeyValues
BfsRemovePolicyFromGlobalFileTable
BfsReparseNamedPipe
BfsUninitializeGlobalFileTable
BfsUninitializePipeMappingTable
BfsUninitializePolicyTable
BfsUnload
BfsUpdateGlobalFilePolicy
BfsUpdatePolicySecurity
BfsUpdateUserPolicyDirectorySecurity
BfsVerifyPolicySecurity
BfsVerifyVolumeRootDescriptor
DriverEntry
KappxParsePackageFullNameFromToken
MIDL_user_free
| |paramcount|0|0| |address|EXTERNAL:0000007a|EXTERNAL:0000007a| |sig|undefined ExFreePoolWithTag(void)|undefined ExFreePoolWithTag(void)| |sym_type|Function|Function| |sym_source|IMPORTED|IMPORTED| |external|True|True| ### NTOSKRNL.EXE::ExFreePoolWithTag Calling Diff ```diff --- NTOSKRNL.EXE::ExFreePoolWithTag calling +++ NTOSKRNL.EXE::ExFreePoolWithTag calling @@ -5,0 +6 @@ +BfsCloseRootDirectory ``` Generated with `ghidriff` version: 1.0.0 on 2026-07-25T10:17:05