VulnerabilityPublished 4 Oct 2025Updated 21 Oct 2026

CVE-2025-39940: Linux kernel · dm-stripe: fix a possible integer overflow

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f8f64254bca5ae58f3b679441962bda4c409f659 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 UTC

Severity

Unrated

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f8f64254bca5ae58f3b679441962bda4c409f659, ee27658c239b27721397f3e4eb16370b5cce596e, 1071d560afb4c245c2076494226df47db5a35708 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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 f8f64254bca5ae58f3b679441962bda4c409f659, ee27658c239b27721397f3e4eb16370b5cce596e, 1071d560afb4c245c2076494226df47db5a35708 or 891ab8c6954199e4f36029b49df86c8b1d6b0b2f.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 40bea431274c247425e7f5970d796ff7b37a2b22, < f8f64254bca5ae58f3b679441962bda4c409f659	Fixed in f8f64254bca5ae58f3b679441962bda4c409f659
LinuxLinux	Affected ≥ 40bea431274c247425e7f5970d796ff7b37a2b22, < ee27658c239b27721397f3e4eb16370b5cce596e	Fixed in ee27658c239b27721397f3e4eb16370b5cce596e
LinuxLinux	Affected ≥ 40bea431274c247425e7f5970d796ff7b37a2b22, < 1071d560afb4c245c2076494226df47db5a35708	Fixed in 1071d560afb4c245c2076494226df47db5a35708
LinuxLinux	Affected ≥ 40bea431274c247425e7f5970d796ff7b37a2b22, < 891ab8c6954199e4f36029b49df86c8b1d6b0b2f	Fixed in 891ab8c6954199e4f36029b49df86c8b1d6b0b2f
LinuxLinux	Affected =2.6.31	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: dm-stripe: fix a possible integer overflow There's a possible integer overflow in stripe_io_hints if we have too large chunk size. Test if the overflow happened, and if it did, don't set limits->io_min and limits->io_opt;

References

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