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VulnerabilityPublished Updated

CVE-2026-53345: Linux kernel · KVM: Don't WARN if memory is dirtied without a vCPU when the VM is dying

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in 8618004d3e897c0f1b71d9a9ab860461289bb89a : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:49 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in 8618004d3e897c0f1b71d9a9ab860461289bb89a, 343e95c8ecc40e0738975ef4ee24c0c35e800e6b, 99d7d43784ae3235026581e9bf892c036e04c8e6 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 2efd61a608b0039911924d2e5d7028eb37496e85, < 8618004d3e897c0f1b71d9a9ab860461289bb89a
Fixed in
  • 8618004d3e897c0f1b71d9a9ab860461289bb89a
LinuxLinuxAffected
  • ≥ 2efd61a608b0039911924d2e5d7028eb37496e85, < 343e95c8ecc40e0738975ef4ee24c0c35e800e6b
Fixed in
  • 343e95c8ecc40e0738975ef4ee24c0c35e800e6b
LinuxLinuxAffected
  • ≥ 2efd61a608b0039911924d2e5d7028eb37496e85, < 99d7d43784ae3235026581e9bf892c036e04c8e6
Fixed in
  • 99d7d43784ae3235026581e9bf892c036e04c8e6
LinuxLinuxAffected
  • ≥ 2efd61a608b0039911924d2e5d7028eb37496e85, < 66a8e7ddd901023c89a2733494d827eca3f9c1b0
Fixed in
  • 66a8e7ddd901023c89a2733494d827eca3f9c1b0
LinuxLinuxAffected
  • ≥ 2efd61a608b0039911924d2e5d7028eb37496e85, < 033d39e41fc30f484f4e4f37fb4cd76b12cbb18e
Fixed in
  • 033d39e41fc30f484f4e4f37fb4cd76b12cbb18e
LinuxLinuxAffected
  • ≥ 2efd61a608b0039911924d2e5d7028eb37496e85, < 21b880f040bd0e8b50ff30c5a40db7bf3384ff48
Fixed in
  • 21b880f040bd0e8b50ff30c5a40db7bf3384ff48

AI-suggested

A fix has been applied in the Linux kernel to address this issue. Users should update to a kernel version including the fix identified by the provided commit hashes. No additional action is required as the fix prevents false WARNs and memory leaks during VM destruction.

Description

This vulnerability in the Linux kernel's KVM subsystem involves a WARN triggered when memory is dirtied without a running vCPU while the VM is dying. The issue arises because KVM complains about dirtying guest memory without a loaded vCPU only if the VM is still alive. The fix prevents false positive WARNs during VM destruction, particularly for x86 SEV-ES guests, and addresses a memory leak without impacting the correctness of dirty page tracking.

References

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