CVE-2026-31566

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)

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/bc7760c107dc08ef3e231d72c492e67b0a86848b ↗
• https://git.kernel.org/stable/c/e23602eb0779760544314ed3905fa6a89a4e4070 ↗
• https://git.kernel.org/stable/c/138e42be35ff2ce6572ae744de851ea286cf3c69 ↗
• https://git.kernel.org/stable/c/39820864eacd886f1a6f817414fb8f9ea3e9a2b4 ↗
• https://git.kernel.org/stable/c/42d248726a0837640452b71c5a202ca3d35239ec ↗
• https://git.kernel.org/stable/c/7150850146ebfa4ca998f653f264b8df6f7f85be ↗