CVE-2025-40216 The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-KERNELHEADERS-14200140
- published6 Dec 2025
- disclosed4 Dec 2025
Introduced: 4 Dec 2025
CVE-2025-40216 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2418801
- https://access.redhat.com/security/cve/CVE-2025-40216
- https://git.kernel.org/stable/c/3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b
- https://git.kernel.org/stable/c/50998b0ae7d9d552e96d8b7239981cf05f65eff5
- https://git.kernel.org/stable/c/f16769241594be59387b56ab525e327f54377e60