Bug 2492725 (CVE-2026-53277) - CVE-2026-53277 kernel: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation
Summary: CVE-2026-53277 kernel: KVM: arm64: Take the SRCU lock for page table walks in...
Keywords:
Status: NEW
Alias: CVE-2026-53277
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 10:02 UTC by OSIDB Bzimport
Modified: 2026-10-06 17:32 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:64775 0 None None None 2026-09-08 07:19:48 UTC

Description OSIDB Bzimport 2026-06-25 10:02:31 UTC 
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.
Comment 1 TEJ RATHI 2026-06-26 07:39:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062520-CVE-2026-53277-4338@gregkh/T
Comment 3 errata-xmlrpc 2026-09-08 07:19:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:64775 https://access.redhat.com/errata/RHSA-2026:64775
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