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
Not known to be exploited · fixed in 8618004d3e897c0f1b71d9a9ab860461289bb89a : update Linux kernel when convenient.
Data as of 30 Oct 2026, 12:49 UTC
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
Disclosed: evidence found.
CVE published 1 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/21b880f040bd0e8b50ff30c5a40db7bf3384ff48 (opens in a new tab)
- git.kernel.org/stable/c/033d39e41fc30f484f4e4f37fb4cd76b12cbb18e (opens in a new tab)
- git.kernel.org/stable/c/66a8e7ddd901023c89a2733494d827eca3f9c1b0 (opens in a new tab)
- git.kernel.org/stable/c/343e95c8ecc40e0738975ef4ee24c0c35e800e6b (opens in a new tab)
- git.kernel.org/stable/c/99d7d43784ae3235026581e9bf892c036e04c8e6 (opens in a new tab)
- git.kernel.org/stable/c/8618004d3e897c0f1b71d9a9ab860461289bb89a (opens in a new tab)