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Windows Hypervisor-Protected Code Integrity

CVE-2024-21431 — Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability

Important CVSS 6.7 EPSS 0.00637 2024-03 archive

Executive Summary

None

Overview

6.7
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Security Feature Bypass
Released Mar 12 2024
Last Updated Mar 12 2024
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00637 — 0.45702 percentile
NVD CVSS 6.7 MEDIUM — differs from MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8

EPSS Score

0.00637
probability of exploitation in the next 30 days
0.45702 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

13 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 21H2 for 32-bit Systems 5035845 (Security Update) Important Security Feature Bypass Yes
Windows 10 Version 21H2 for ARM64-based Systems 5035845 (Security Update) Important Security Feature Bypass Yes
Windows 10 Version 21H2 for x64-based Systems 5035845 (Security Update) Important Security Feature Bypass Yes
Windows 10 Version 22H2 for 32-bit Systems 5035845 (Security Update) Important Security Feature Bypass Yes
Windows 10 Version 22H2 for ARM64-based Systems 5035845 (Security Update) Important Security Feature Bypass Yes
Windows 10 Version 22H2 for x64-based Systems 5035845 (Security Update) Important Security Feature Bypass Yes
Windows 11 version 21H2 for ARM64-based Systems 5035854 (Security Update) Important Security Feature Bypass Yes
Windows 11 version 21H2 for x64-based Systems 5035854 (Security Update) Important Security Feature Bypass Yes
Windows 11 Version 22H2 for ARM64-based Systems 5035853 (Security Update) Important Security Feature Bypass Yes
Windows 11 Version 22H2 for x64-based Systems 5035853 (Security Update) Important Security Feature Bypass Yes
Windows 11 Version 23H2 for ARM64-based Systems 5035853 (Security Update) Important Security Feature Bypass Yes
Windows 11 Version 23H2 for x64-based Systems 5035853 (Security Update) Important Security Feature Bypass Yes
Windows Server 2022 5035857 (Security Update) 5035959 (SecurityHotpatchUpdate) Important Security Feature Bypass 5034770 5034860 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.2340 10.0.20348.2333 Yes None Windows Server 2022 (Server Core installation) 5035857 (Security Update) 5035959 (SecurityHotpatchUpdate) Important Security Feature Bypass 5034770 5034860 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.2340 10.0.20348.2333 Yes None Windows Server 2022, 23H2 Edition (Server Core installation) 5035856 (Security Update) Important Security Feature Bypass Yes

Patches

4 patches
Article Type Restart
5035845 Security Update Yes
5035854 Security Update Yes
5035853 Security Update Yes
5035856 Security Update Yes

Known Exploits

Acknowledgments

Anonymous

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