CVE-2026-31452: Linux kernel · ext4: convert inline data to extents when truncate exceeds inline size
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f53a5d9f32924bc2a810d2df243b7714da58b636 : 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 f53a5d9f32924bc2a810d2df243b7714da58b636, ed9356a30e59c7cc3198e7fc46cfedf3767b9b17, c047332be7195833a5c5126816c2502df8269fe4 +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 in the Linux kernel versions identified by the provided commit hashes. Users should update to a kernel version that includes these fixes to prevent the kernel crash caused by this vulnerability.
Description
A vulnerability in the Linux kernel ext4 filesystem handling was fixed by ensuring that files with inline data storage convert to extent-based storage when truncated beyond the inline capacity. Without this fix, truncating a file to a size larger than the inline data capacity could cause a kernel crash due to inconsistent filesystem state.
References
- git.kernel.org/stable/c/110d7ef602659ce4d7947c5480f7ca2779696aaf (opens in a new tab)
- git.kernel.org/stable/c/f53a5d9f32924bc2a810d2df243b7714da58b636 (opens in a new tab)
- git.kernel.org/stable/c/c047332be7195833a5c5126816c2502df8269fe4 (opens in a new tab)
- git.kernel.org/stable/c/699bac4d4c951974d55b045c983d1de777215949 (opens in a new tab)
- git.kernel.org/stable/c/7920dcc571cef3d8aa9ee109c136125d61d41669 (opens in a new tab)
- git.kernel.org/stable/c/93cb2d103e5c707de0f7ad58a39b7f0fddc27aa6 (opens in a new tab)
- git.kernel.org/stable/c/07c1a31af18290054da3d18221b8bf58983c5d3a (opens in a new tab)
- git.kernel.org/stable/c/ed9356a30e59c7cc3198e7fc46cfedf3767b9b17 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)