Improper Update of Reference Count The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)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-15295156
- published17 Feb 2026
- disclosed14 Feb 2026
Introduced: 14 Feb 2026
CVE-2026-23129 (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:
dpll: Prevent duplicate registrations
Modify the internal registration helpers dpll_xa_ref_{dpll,pin}_add() to reject duplicate registration attempts.
Previously, if a caller attempted to register the same pin multiple times (with the same ops, priv, and cookie) on the same device, the core silently increments the reference count and return success. This behavior is incorrect because if the caller makes these duplicate registrations then for the first one dpll_pin_registration is allocated and for others the associated dpll_pin_ref.refcount is incremented. During the first unregistration the associated dpll_pin_registration is freed and for others WARN is fired.
Fix this by updating the logic to return -EEXIST if a matching
registration is found to enforce a strict "register once" policy.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2439876
- https://access.redhat.com/security/cve/CVE-2026-23129
- https://git.kernel.org/stable/c/236a657422a564859dcd0db7bdb486abb21a721a
- https://git.kernel.org/stable/c/dfec0501dba8f4711ef142a6a890e4812b7af88c
- https://git.kernel.org/stable/c/f3ddbaaaaf4d0633b40482f471753f9c71294a4a