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Vulnerability record · CVE-2026-53277 · published 25 June 2026

CVE-2026-53277: Linux kernel vulnerability

Linux · Linux Kernel

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.

8.8 CVSS 3.1 High EPSS 0.15% · top 96.3% CWE-662 · CWE-662CWE-820 · CWE-820
8.8CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
9 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc Patch
https://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39 Patch
https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251 Patch
https://access.redhat.com/errata/RHSA-2026:64775
https://access.redhat.com/security/cve/CVE-2026-53277 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492725 Issue TrackingThird Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53277.json Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-53277), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.