Incorrect Check of Function Return Value The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)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-14455318
- published17 Dec 2025
- disclosed16 Dec 2025
Introduced: 16 Dec 2025
CVE-2025-68186 (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:
ring-buffer: Do not warn in ring_buffer_map_get_reader() when reader catches up
The function ring_buffer_map_get_reader() is a bit more strict than the other get reader functions, and except for certain situations the rb_get_reader_page() should not return NULL. If it does, it triggers a warning.
This warning was triggering but after looking at why, it was because another acceptable situation was happening and it wasn't checked for.
If the reader catches up to the writer and there's still data to be read on the reader page, then the rb_get_reader_page() will return NULL as there's no new page to get.
In this situation, the reader page should not be updated and no warning should trigger.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2422697
- https://access.redhat.com/security/cve/CVE-2025-68186
- https://git.kernel.org/stable/c/6f5c4f8109fa4d0955b3712597a26b310bdc736f
- https://git.kernel.org/stable/c/aa997d2d2a0b2e76f4df0f1f12829f02acb4fb6b
- https://git.kernel.org/stable/c/b42dbef4f208326271434d5ab71c4129a3ddd1a9