CVE-2026-31566 (GCVE-0-2026-31566)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:35 – Updated: 2026-05-11 22:11
VLAI
Title
drm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib
Summary
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)
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9ae55f030dc523fc4dc6069557e4a887ea815453 , < bc7760c107dc08ef3e231d72c492e67b0a86848b (git)
Affected: 9ae55f030dc523fc4dc6069557e4a887ea815453 , < e23602eb0779760544314ed3905fa6a89a4e4070 (git)
Affected: 9ae55f030dc523fc4dc6069557e4a887ea815453 , < 138e42be35ff2ce6572ae744de851ea286cf3c69 (git)
Affected: 9ae55f030dc523fc4dc6069557e4a887ea815453 , < 39820864eacd886f1a6f817414fb8f9ea3e9a2b4 (git)
Affected: 9ae55f030dc523fc4dc6069557e4a887ea815453 , < 42d248726a0837640452b71c5a202ca3d35239ec (git)
Affected: 9ae55f030dc523fc4dc6069557e4a887ea815453 , < 7150850146ebfa4ca998f653f264b8df6f7f85be (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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