CVE-2026-53277highCWE-820

CVE-2026-53277: high-severity vulnerability in Linux

KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.1%
exploitation probability
0.1%top 99% of all CVEs
observed exploitation
nono source reports it
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
Linux · Linux
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References
https://access.redhat.com/errata/RHSA-2026:64775https://access.redhat.com/security/cve/CVE-2026-53277https://bugzilla.redhat.com/show_bug.cgi?id=2492725https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bchttps://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53277.json