Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dma-fence: Fix potential tracepoint null pointer dereferences Trace_dma_fence_signaled, trace_dma_fence_wait_end and trace_dma_fence_destroy can all currently dereference a null fence->ops pointer after it has been reset on fence signalling. Lets use the safe string getters for most tracepoints to avoid this class of a problem, while for the signal tracepoint we move it to before ops are cleared to avoid losing the driver and timeline name information. Apart from moving it we also need to add a new tracepoint class to bypass the safe name getters since the signaled bit is already set. For dma_fence_init we also need to use the new tracepoint class since the rcu read lock is not held there, and we can do the same for the enable signaling since there we are certain the fence cannot be signaled while we are holding the lock and have even validated the fence->ops.
References
- https://git.kernel.org/stable/c/4e01fc9a5bc49b04fad403ffa71299b35e132ca8
- https://git.kernel.org/stable/c/e94b9f01543cc6a83538c2c2cc645a424d3015ca
FAQ
What is CVE-2026-74418?
CVE-2026-74418 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: dma-fence: Fix potential tracepoint null pointer dereferences Trace_dma_fence_signaled, trace_dma_fence_wait_end and trace_dma_fen...
How severe is CVE-2026-74418?
CVSS scoring is not yet available for CVE-2026-74418. Check NVD for updates.
Is there a patch for CVE-2026-74418?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.