Bug 2492318 (CVE-2026-52950)

Summary: CVE-2026-52950 kernel: drm/xe/dma-buf: fix UAF with retry loop
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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OS: Linux   
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A flaw was found in the Linux kernel, specifically within the drm/xe/dma-buf component. This Use-After-Free (UAF) vulnerability occurs due to an issue in a retry loop, where a buffer object is prematurely freed on error. An attacker could potentially exploit this to cause memory corruption, leading to system instability or, in some cases, arbitrary code execution.
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Description OSIDB Bzimport 2026-06-24 18:05:23 UTC 
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)
Comment 1 Keith Grant 2026-06-26 17:45:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062433-CVE-2026-52950-9c1a@gregkh/T
Comment 5 errata-xmlrpc 2026-07-21 17:10:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:42919 https://access.redhat.com/errata/RHSA-2026:42919