CVE-2026-97900

CVE CVE-2026-97900EUVD EUVD-2026-86754Published 2026-09-25T10:22:28.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: drm/drm_exec: fix up contended obj when num_objects is 0 drm_exec_prepare_array() silently returns success without calling drm_exec_lock_contended() when num_objects is zero. This breaks the invariant upheld by drm_exec_lock_obj(), where every entry point into the locking sequence must first attempt to lock any previously contended object before proceeding. Drivers that chain multiple drm_exec_prepare_array() calls per drm_exec_until_all_locked() iteration (e.g. amdgpu's userq signal/wait ioctls, which prepare separate read and write BO arrays) can pass an empty array for one of the two calls. If contention is hit while preparing the non-empty array, exec->contended is set and the loop retries; on retry, the empty-array call preceding it is a no-op that never clears exec->contended, so drm_exec_retry_on_contention() immediately jumps back to the top of the loop without ever reaching the call that would resolve the contention. This spins forever. Fix it by having drm_exec_prepare_array() call drm_exec_lock_contended() directly when num_objects is zero, so a pending contended object dont loop infinitely.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 7.2.7; 09593216bff15866f95c8ad406cb7fdcec1ee40a <a565022c02f218ec9789c2baf4690792e7a48cbb; patch: 0; patch: 7.3-rc3; patch: 6.18.53; 09593216bff15866f95c8ad406cb7fdcec1ee40a <159720704d9d652b64390c11fb971e15b0a78d23; 09593216bff15866f95c8ad406cb7fdcec1ee40a <f3e74866018dab793ebee1fdf0ef34f7271d1f8c; patch: 6.12.111; 09593216bff15866f95c8ad406cb7fdcec1ee40a <831cd124ce99c3e61266bed30519d52f7c26abed; 6.6

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.