CVE-2026-52950
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile — higher than 3% of all known CVEs
Summary
In the Linux kernel, a use-after-free (UAF) vulnerability was found in the DRM/Xe driver's dma-buf handling. The retry loop frees the buffer object (bo) on error, causing access to freed memory. The fix moves allocation and initialization before the attach operation, making retry safe.
Risk Assessment
This vulnerability could cause system crashes (kernel panic) or potentially privilege escalation if triggered by an attacker with local access. Systems with Intel Xe graphics are affected.
Recommendation
Immediately update the Linux kernel to a version containing commit 479669418253e0f27f8cf5db01a731352ea592e7 or later. For production systems, apply the security patch from your distributor.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: drm/xe/dma-buf: fix UAF with retry loop Retry doesn't work here, since bo will be freed on error, leading to UAF. However, now that we do the alloc & init before the attach, we can now combine this as one unit and have the init do the alloc for us. This should make the retry safe. Reported by Sashiko. v2: Fix up the error unwind (CI) (cherry picked from commit 479669418253e0f27f8cf5db01a731352ea592e7)