Bug 2429600 (CVE-2025-71124)

Summary: CVE-2025-71124 kernel: drm/msm/a6xx: move preempt_prepare_postamble after error check
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-01-14 16:03:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/msm/a6xx: move preempt_prepare_postamble after error check

Move the call to preempt_prepare_postamble() after verifying that
preempt_postamble_ptr is valid. If preempt_postamble_ptr is NULL,
dereferencing it in preempt_prepare_postamble() would lead to a crash.

This change avoids calling the preparation function when the
postamble allocation has failed, preventing potential NULL pointer
dereference and ensuring proper error handling.

Patchwork: https://patchwork.freedesktop.org/patch/687659/
Comment 1 Jon Moroney 2026-01-14 19:43:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011417-CVE-2025-71124-5da0@gregkh/T