CVE-2025-40216
In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: don't rely on user vaddr alignment There is no guaranteed alignment for user pointers, however the calculation of an offset of the first page into a folio after coalescing uses some weird bit mask logic, get rid of it.
Affected versions
Linux kernel versions
6.12
and later are affected. Fixed in
6.12.36,
6.15.5,
6.16
and their respective stable series.
References
The following references provide additional information about CVE-2025-40216 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/3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b
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PatchKernel patch commithttps://git.kernel.org/stable/c/50998b0ae7d9d552e96d8b7239981cf05f65eff5
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PatchKernel patch commithttps://git.kernel.org/stable/c/f16769241594be59387b56ab525e327f54377e60
Frequently asked questions
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What is CVE-2025-40216?
CVE-2025-40216 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12 onward and has been patched in 6.12.36, 6.15.5 and 6.16. CVE-2025-40216 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-2025-40216?
Yes — CVE-2025-40216 has been patched. Fixed versions include 6.12.36, 6.15.5 and 6.16. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40216 actively exploited?
No — CVE-2025-40216 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.