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VulnerabilityPublished Updated

CVE-2026-31452: Linux kernel · ext4: convert inline data to extents when truncate exceeds inline size

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f53a5d9f32924bc2a810d2df243b7714da58b636 : patch Linux kernel soon.

Data as of 5 Nov 2026, 22:33 UTC

Severity
High

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

  1. Disclosed: evidence found.

    CVE published 22 Apr 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 5 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 67cf5b09a46f72e048501b84996f2f77bc42e947, < f53a5d9f32924bc2a810d2df243b7714da58b636
Fixed in
  • f53a5d9f32924bc2a810d2df243b7714da58b636
LinuxLinuxAffected
  • ≥ 67cf5b09a46f72e048501b84996f2f77bc42e947, < ed9356a30e59c7cc3198e7fc46cfedf3767b9b17
Fixed in
  • ed9356a30e59c7cc3198e7fc46cfedf3767b9b17
LinuxLinuxAffected
  • ≥ 67cf5b09a46f72e048501b84996f2f77bc42e947, < c047332be7195833a5c5126816c2502df8269fe4
Fixed in
  • c047332be7195833a5c5126816c2502df8269fe4
LinuxLinuxAffected
  • ≥ 67cf5b09a46f72e048501b84996f2f77bc42e947, < 7920dcc571cef3d8aa9ee109c136125d61d41669
Fixed in
  • 7920dcc571cef3d8aa9ee109c136125d61d41669
LinuxLinuxAffected
  • ≥ 67cf5b09a46f72e048501b84996f2f77bc42e947, < 699bac4d4c951974d55b045c983d1de777215949
Fixed in
  • 699bac4d4c951974d55b045c983d1de777215949
LinuxLinuxAffected
  • ≥ 67cf5b09a46f72e048501b84996f2f77bc42e947, < 110d7ef602659ce4d7947c5480f7ca2779696aaf
Fixed in
  • 110d7ef602659ce4d7947c5480f7ca2779696aaf

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

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