CVE-2026-53277 Details
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation walk_s1() and kvm_walk_nested_s2() expect to be called while holding kvm->srcu to guard against memslot changes. While this is generally the case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the respective walkers without taking kvm->srcu. Fix by acquiring kvm->srcu prior to the table walk in both instances.
A vulnerability exists in the Linux kernel's KVM module for ARM64 architecture, specifically in how page table walks are handled during fault injection and emulation of certain operations. The issue arises because two functions, __kvm_at_s12() and __kvm_find_s1_desc_level(), call page table walkers without first acquiring the necessary SRCU lock, which is essential to prevent conflicts with changes in memory slots. This oversight could lead to inconsistencies or errors during the emulation process.
The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version of the stable Linux kernel where this issue has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:64775 | redhat-SADP | |
| https://access.redhat.com/security/cve/CVE-2026-53277 | redhat-SADP | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2492725 | redhat-SADP | Issue TrackingThird Party Advisory |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53277.json | redhat-SADP | Third Party Advisory |
| https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc | kernel.org | Patch |
| https://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-662 | Improper Synchronization | [email protected] |
| CWE-820 | Missing Synchronization | redhat-SADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.12, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 9, 2026 | CVE Modified | redhat-SADP |
| Sep 9, 2026 | CVE Modified | kernel.org |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jul 8, 2026 | Initial Analysis | [email protected] |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 28, 2026 | CVE Modified | kernel.org |
| Jun 25, 2026 | New CVE Received | kernel.org |