CVE Watch30 jul 2026

CVE-2025-38703

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Make dma-fences compliant with the safe access rules Xe can fr

CVSS

7.8

Alto

EPSS

0.2%

KEV

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Exploit Today

0-100

Publicado: 4 sept 2025 · Última mod.: 30 jul 2026 · CWE-416

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-07-022026-07-30

Descripción técnica

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Make dma-fences compliant with the safe access rules Xe can free some of the data pointed to by the dma-fences it exports. Most notably the timeline name can get freed if userspace closes the associated submit queue. At the same time the fence could have been exported to a third party (for example a sync_fence fd) which will then cause an use- after-free on subsequent access. To make this safe we need to make the driver compliant with the newly documented dma-fence rules. Driver has to ensure a RCU grace period between signalling a fence and freeing any data pointed to by said fence. For the timeline name we simply make the queue be freed via kfree_rcu and for the shared lock associated with multiple queues we add a RCU grace period before freeing the per GT structure holding the lock.

Referencias oficiales

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