CVE-2026-31566

drm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib

State: Published
Severity: 7.8 High
Published: Apr 24, 2026
Updated: Oct 19, 2026
Reserved: Mar 9, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib

amdgpu_amdkfd_submit_ib() submits a GPU job and gets a fence from amdgpu_ib_schedule(). This fence is used to wait for job completion.

Currently, the code drops the fence reference using dma_fence_put() before calling dma_fence_wait().

If dma_fence_put() releases the last reference, the fence may be freed before dma_fence_wait() is called. This can lead to a use-after-free.

Fix this by waiting on the fence first and releasing the reference only after dma_fence_wait() completes.

Fixes the below: drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:697 amdgpu_amdkfd_submit_ib() warn: passing freed memory 'f' (line 696)

(cherry picked from commit 8b9e5259adc385b61a6590a13b82ae0ac2bd3482)

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	9ae55f030dc523fc4dc6069557e4a887ea815453 to before bc7760c107dc08ef3e231d72c492e67b0a86848bAffected 9ae55f030dc523fc4dc6069557e4a887ea815453 to before e23602eb0779760544314ed3905fa6a89a4e4070Affected 9ae55f030dc523fc4dc6069557e4a887ea815453 to before 138e42be35ff2ce6572ae744de851ea286cf3c69Affected 9ae55f030dc523fc4dc6069557e4a887ea815453 to before 39820864eacd886f1a6f817414fb8f9ea3e9a2b4Affected 9ae55f030dc523fc4dc6069557e4a887ea815453 to before 42d248726a0837640452b71c5a202ca3d35239ecAffected 9ae55f030dc523fc4dc6069557e4a887ea815453 to before 7150850146ebfa4ca998f653f264b8df6f7f85beAffected
LinuxLinux	6.0Affected before 6.0Not affected 6.1.168 through 6.1.Not affected 6.6.131 through 6.6.Not affected 6.12.80 through 6.12.Not affected 6.18.21 through 6.18.Not affected 6.19.11 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

9ae55f030dc523fc4dc6069557e4a887ea815453 to before bc7760c107dc08ef3e231d72c492e67b0a86848bAffected
9ae55f030dc523fc4dc6069557e4a887ea815453 to before e23602eb0779760544314ed3905fa6a89a4e4070Affected
9ae55f030dc523fc4dc6069557e4a887ea815453 to before 138e42be35ff2ce6572ae744de851ea286cf3c69Affected
9ae55f030dc523fc4dc6069557e4a887ea815453 to before 39820864eacd886f1a6f817414fb8f9ea3e9a2b4Affected
9ae55f030dc523fc4dc6069557e4a887ea815453 to before 42d248726a0837640452b71c5a202ca3d35239ecAffected
9ae55f030dc523fc4dc6069557e4a887ea815453 to before 7150850146ebfa4ca998f653f264b8df6f7f85beAffected

LinuxLinux

6.0Affected
before 6.0Not affected
6.1.168 through 6.1.*Not affected
6.6.131 through 6.6.*Not affected
6.12.80 through 6.12.*Not affected
6.18.21 through 6.18.*Not affected
6.19.11 through 6.19.*Not affected
7.0 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.