CVE-2026-31455: Linux kernel · xfs: stop reclaim before pushing AIL during unmount
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e6cc490048f78b009259a5f032acead9f789c34c : patch Linux kernel soon.
Data as of 5 Nov 2026, 22:33 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-05.
- Patch
- Available – fixed in e6cc490048f78b009259a5f032acead9f789c34c, d38135af04a3ad8a585c899d176efc8e97853115, bda27fc0b4eb3a425d9a18475c4cb94fbe862c60 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 22 Apr 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 5 Nov 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 is available and has been applied in the Linux kernel. Users should update to a fixed kernel version that includes the patches identified by the provided commit hashes. No additional mitigation is required beyond applying the official fix.
Description
CVE-2026-31455 is a vulnerability in the Linux kernel's XFS filesystem unmount process. The issue arises because background reclaim and inode garbage collection (inodegc) continue running while the Active Item List (AIL) is being pushed during unmount, which can cause races and corruption. The flaw is fixed by reordering the unmount sequence to stop inodegc and cancel background reclaim before pushing the AIL.
References
- git.kernel.org/stable/c/e6cc490048f78b009259a5f032acead9f789c34c (opens in a new tab)
- git.kernel.org/stable/c/239d734c00644072862fa833805c4471573b1445 (opens in a new tab)
- git.kernel.org/stable/c/bda27fc0b4eb3a425d9a18475c4cb94fbe862c60 (opens in a new tab)
- git.kernel.org/stable/c/d38135af04a3ad8a585c899d176efc8e97853115 (opens in a new tab)
- git.kernel.org/stable/c/a89434a6188d8430ea31120da96e3e4cefb58686 (opens in a new tab)
- git.kernel.org/stable/c/8147e304d7d32fd5c3e943babc296ce2873dc279 (opens in a new tab)
- git.kernel.org/stable/c/558e3275d8a3b101be18a7fe7d1634053e9d9b07 (opens in a new tab)
- git.kernel.org/stable/c/4f24a767e3d64a5f58c595b5c29b6063a201f1e3 (opens in a new tab)