CVE-2025-40267
In the Linux kernel, the following vulnerability has been resolved: io_uring/rw: ensure allocated iovec gets cleared for early failure A previous commit reused the recyling infrastructure for early cleanup, but this is not enough for the case where our internal caches have overflowed. If this happens, then the allocated iovec can get leaked if the request is also aborted early. Reinstate the previous forced free of the iovec for that situation.
Affected versions
Linux kernel versions
6.14
and later are affected. Fixed in
6.17.9,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40267 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/094c6467fe05e0de618c5a7fcff4d3ee20aeaef8
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PatchKernel patch commithttps://git.kernel.org/stable/c/d3c9c213c0b86ac5dd8fe2c53c24db20f1f510bc
Frequently asked questions
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What is CVE-2025-40267?
CVE-2025-40267 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.14 onward and has been patched in 6.17.9 and 6.18. CVE-2025-40267 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-40267?
Yes — CVE-2025-40267 has been patched. Fixed versions include 6.17.9 and 6.18. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40267 actively exploited?
No — CVE-2025-40267 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.