KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation
CVE-2026-53277 · published 25 Jun 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-53277?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: be04cebf3e78874627dc1042991d5d504464a5cc to < 0648b375aa951cc15d9e90f9ac4de71e0b51fa45, be04cebf3e78874627dc1042991d5d504464a5cc to < 97706097f9b851cfe55c3b00b083dfc2bcf542bc, be04cebf3e78874627dc1042991d5d504464a5cc to < ec42b4ed1b072ea2d03f086061aa67bad6d8de39, be04cebf3e78874627dc1042991d5d504464a5cc to < f2ca45b50d4216c9cc7ffabf50d9ad1932209251
- Linux Linux: 6.12
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/0648b375aa951cc15d9e90f9ac4de71e0b51fa45
- git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc
- git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39
- git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON