CVE-2026-53277 – KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation

CVE ID :CVE-2026-53277

Published : June 25, 2026, 8:40 a.m. | 1 hour, 4 minutes ago

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.

Severity: 0.0 | NA

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