CVE-2026-53277
8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | be04cebf3e78874627dc1042991d5d504464a5cc < 97706097f9b851cfe55c3b00b083dfc2bcf542bc | affected |
| Linux | Linux | be04cebf3e78874627dc1042991d5d504464a5cc < ec42b4ed1b072ea2d03f086061aa67bad6d8de39 | affected |
| Linux | Linux | be04cebf3e78874627dc1042991d5d504464a5cc < f2ca45b50d4216c9cc7ffabf50d9ad1932209251 | affected |
| Linux | Linux | 6.12 | affected |
| Linux | Linux | 0 < 6.12 | unaffected |
| Linux | Linux | 6.18.36 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.13 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
ADP Enrichment
kernel: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation
Additional References
- https://access.redhat.com/security/cve/CVE-2026-53277
- https://bugzilla.redhat.com/show_bug.cgi?id=2492725
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53277.json
References
- https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc
- https://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39
- https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251
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