VulnerabilityPublished 18 Mar 2026Updated 5 Nov 2026

CVE-2026-23251: Linux kernel · xfs: only call xf{array,blob}_destroy if we have a valid pointer

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d827612c81a26cc1dd83a211cfcb5ad8765da0c4 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 22:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

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 d827612c81a26cc1dd83a211cfcb5ad8765da0c4, c9ccefacae0d8091683447bc338bd7741417039d, ba408d299a3bb3c5309f40c5326e4fb83ead4247 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Mar 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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to d827612c81a26cc1dd83a211cfcb5ad8765da0c4, c9ccefacae0d8091683447bc338bd7741417039d, ba408d299a3bb3c5309f40c5326e4fb83ead4247 or 5de5be3ed7e7fa4ebde4f4b58fb9a629644f9202.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ab97f4b1c030750f2475bf4da8a9554d02206640, < d827612c81a26cc1dd83a211cfcb5ad8765da0c4	Fixed in d827612c81a26cc1dd83a211cfcb5ad8765da0c4
LinuxLinux	Affected ≥ ab97f4b1c030750f2475bf4da8a9554d02206640, < c9ccefacae0d8091683447bc338bd7741417039d	Fixed in c9ccefacae0d8091683447bc338bd7741417039d
LinuxLinux	Affected ≥ ab97f4b1c030750f2475bf4da8a9554d02206640, < ba408d299a3bb3c5309f40c5326e4fb83ead4247	Fixed in ba408d299a3bb3c5309f40c5326e4fb83ead4247
LinuxLinux	Affected ≥ ab97f4b1c030750f2475bf4da8a9554d02206640, < 5de5be3ed7e7fa4ebde4f4b58fb9a629644f9202	Fixed in 5de5be3ed7e7fa4ebde4f4b58fb9a629644f9202
LinuxLinux	Affected =6.10	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: xfs: only call xf{array,blob}_destroy if we have a valid pointer Only call the xfarray and xfblob destructor if we have a valid pointer, and be sure to null out that pointer afterwards. Note that this patch fixes a large number of commits, most of which were merged between 6.9 and 6.10.

References

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