CVE-2025-40217
In the Linux kernel, the following vulnerability has been resolved: pidfs: validate extensible ioctls Validate extensible ioctls stricter than we do now.
Affected versions
Linux kernel versions
6.11
and later are affected. Fixed in
6.17.4,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40217 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/3c17001b21b9f168c957ced9384abe969019b609
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PatchKernel patch commithttps://git.kernel.org/stable/c/bf0fbf5e8b0aff8a4a0fb35e32b10083baa83c04
Frequently asked questions
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What is CVE-2025-40217?
CVE-2025-40217 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.11 onward and has been patched in 6.17.4 and 6.18. CVE-2025-40217 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-2025-40217?
Yes — CVE-2025-40217 has been patched. Fixed versions include 6.17.4 and 6.18. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40217 actively exploited?
No — CVE-2025-40217 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.