Windows Kernel
CVE-2019-1125 — Windows Kernel Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory. An attacker who successfully exploited the vulnerability could read privileged data across trust boundaries. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to elevate user rights directly, but it could be used to obtain information that could be used to try to compromise the affected system further. On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees. This vulnerability, released on August 6, 2019, is a variant of the Spectre Variant 1 speculative execution side channel vulnerability and has been assigned CVE-2019-1125 . Microsoft released a security update on July 9, 2019 that addresses the vulnerability through a software change that mitigates how the CPU speculatively accesses memory. Note that this vulnerability does not require a microcode update from your device OEM.
Overview
5.6
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Changed
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.1
EPSS Score
0.04521
probability of exploitation in the next 30 days
0.90537 percentile - updated 2026-07-25
View on FIRST.org
Affected Products
25 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 4507458 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 for x64-based Systems | 4507458 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 4507460 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1607 for x64-based Systems | 4507460 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1703 for 32-bit Systems | 4507450 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1703 for x64-based Systems | 4507450 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1709 for 32-bit Systems | 4507455 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1709 for ARM64-based Systems | 4507455 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1709 for x64-based Systems | 4507455 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for 32-bit Systems | 4507435 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for ARM64-based Systems | 4507435 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for x64-based Systems | 4507435 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 4507469 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 4507469 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4507469 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for 32-bit Systems | 4507453 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for ARM64-based Systems | 4507453 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1903 for x64-based Systems | 4507453 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 4507449 (Monthly Rollup) 4507456 (Security Only) Important Information Disclosure 4503292 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows 7 for x64-based Systems Service Pack 1 4507449 (Monthly Rollup) 4507456 (Security Only) Important Information Disclosure 4503292 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows 8.1 for 32-bit systems 4507448 (Monthly Rollup) 4507457 (Security Only) Important Information Disclosure 4503276 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4507448 (Monthly Rollup) 4507457 (Security Only) Important Information Disclosure 4503276 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows RT 8.1 | 4507448 (Monthly Rollup) |
Important | Information Disclosure | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 4507452 (Monthly Rollup) 4507461 (Security Only) Important Information Disclosure 4503273 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4507452 (Monthly Rollup) 4507461 (Security Only) Important Information Disclosure 4503273 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 for Itanium-Based Systems Service Pack 2 4507452 (Monthly Rollup) 4507461 (Security Only) Important Information Disclosure 4503273 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 4507452 (Monthly Rollup) 4507461 (Security Only) Important Information Disclosure 4503273 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4507452 (Monthly Rollup) 4507461 (Security Only) Important Information Disclosure 4503273 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4507449 (Monthly Rollup) 4507456 (Security Only) Important Information Disclosure 4503292 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4507449 (Monthly Rollup) 4507456 (Security Only) Important Information Disclosure 4503292 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4507449 (Monthly Rollup) 4507456 (Security Only) Important Information Disclosure 4503292 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 4507462 (Monthly Rollup) 4507464 (Security Only) Important Information Disclosure 4503285 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4507462 (Monthly Rollup) 4507464 (Security Only) Important Information Disclosure 4503285 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4507448 (Monthly Rollup) 4507457 (Security Only) Important Information Disclosure 4503276 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4507448 (Monthly Rollup) 4507457 (Security Only) Important Information Disclosure 4503276 Base: 5.6 Temporal: 5.1 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C Yes None Windows Server 2016 | 4507460 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2016 (Server Core installation) | 4507460 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 | 4507469 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 (Server Core installation) | 4507469 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4507435 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1903 (Server Core installation) | 4507453 (Security Update) |
Important | Information Disclosure | Yes |
Patches
8 patches
| Article | Type | Restart |
|---|---|---|
4507458 |
Security Update | Yes |
4507460 |
Security Update | Yes |
4507450 |
Security Update | Yes |
4507455 |
Security Update | Yes |
4507435 |
Security Update | Yes |
4507469 |
Security Update | Yes |
4507453 |
Security Update | Yes |
4507448 |
Monthly Rollup | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Andrei Vlad Lutas & Dan Lutas of Bitdefender
References
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