drm/xe: Fix error cleanup in xe_exec_queue_create_ioctl()

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Summary

CVECVE-2026-52976
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:08 UTC
Updated2026-06-24 17:17:08 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/xe: Fix error cleanup in xe_exec_queue_create_ioctl() Two error handling issues exist in xe_exec_queue_create_ioctl(): 1. When xe_hw_engine_group_add_exec_queue() fails, the error path jumps to put_exec_queue which skips xe_exec_queue_kill(). If the VM is in preempt fence mode, xe_vm_add_compute_exec_queue() has already added the queue to the VM's compute exec queue list. Skipping the kill leaves the queue on that list, leading to a dangling pointer after the queue is freed. 2. When xa_alloc() fails after xe_hw_engine_group_add_exec_queue() has succeeded, the error path does not call xe_hw_engine_group_del_exec_queue() to remove the queue from the hw engine group list. The queue is then freed while still linked into the hw engine group, causing a use-after-free. Fix both by: - Changing the xe_hw_engine_group_add_exec_queue() failure path to jump to kill_exec_queue so that xe_exec_queue_kill() properly removes the queue from the VM's compute list. - Adding a del_hw_engine_group label before kill_exec_queue for the xa_alloc() failure path, which removes the queue from the hw engine group before proceeding with the rest of the cleanup. (cherry picked from commit 37c831f401746a45d510b312b0ed7a77b1e06ec8)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7970cb36966c9b9183255dc097ae0446300eebcf f93b00161213a0fe9f7ff1d8498ee5ca9e0a5c43 git Not specified
CNA Linux Linux affected 7970cb36966c9b9183255dc097ae0446300eebcf 753b149d5a433eb19e0c1b0eb4526a6e26120d1f git Not specified
CNA Linux Linux affected 7970cb36966c9b9183255dc097ae0446300eebcf 1be55646d8a2035343b012dcb12210db7bb8b056 git Not specified
CNA Linux Linux affected 7970cb36966c9b9183255dc097ae0446300eebcf f3cc22d4df3ed58439ea7e21daa54c3608e03b78 git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/753b149d5a433eb19e0c1b0eb4526a6e26120d1f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f3cc22d4df3ed58439ea7e21daa54c3608e03b78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1be55646d8a2035343b012dcb12210db7bb8b056 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f93b00161213a0fe9f7ff1d8498ee5ca9e0a5c43 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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