CVE-2026-80539drm/amdgpu: disallow multiple FENCE chunks in one submit
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: disallow multiple FENCE chunks in one submit amdgpu_cs_pass1() dispatches on chunk_id once per chunk without rejecting repeated ids. p->uf_bo is a single-slot field, so a submission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs amdgpu_cs_p1_user_fence() twice, and the second run overwrites p->uf_bo with a freshly referenced BO without dropping the reference taken by the first. amdgpu_cs_parser_fini() only unrefs the final p->uf_bo, so every FENCE chunk but the last leaks a BO reference. The leaked BO outlives handle close and process exit. Reject duplicate FENCE chunks the same way commit fec5f8e8c6bc ("drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit") did for p->bo_list. (cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d38ceaf99ed015f2a0b9af3499791bd3a3daae21 before 7e9954e7212042ec808b06181b365b14f00c6f0a; from d38ceaf99ed015f2a0b9af3499791bd3a3daae21 before 070229262ede37d17c4ea596650deb6e5eb5d106; from d38ceaf99ed015f2a0b9af3499791bd3a3daae21 before 5f46322e0b84af29e10eb951ff45bd6ea40640de; from d38ceaf99ed015f2a0b9af3499791bd3a3daae21 before 71aa45f7bfe46fbc6f51e7832573ff49b6005fea; from d38ceaf99ed015f2a0b9af3499791bd3a3daae21 before e3ee74d6dbbe409eb99546a7b0a02b2782f9021d; from d38ceaf99ed015f2a0b9af3499791bd3a3daae21 before 931cd1d1baeae68e8eb2c23bc1f3d8934dca6241 | CNA record |
References
- https://git.kernel.org/stable/c/7e9954e7212042ec808b06181b365b14f00c6f0a
- https://git.kernel.org/stable/c/070229262ede37d17c4ea596650deb6e5eb5d106
- https://git.kernel.org/stable/c/5f46322e0b84af29e10eb951ff45bd6ea40640de
- https://git.kernel.org/stable/c/71aa45f7bfe46fbc6f51e7832573ff49b6005fea
- https://git.kernel.org/stable/c/e3ee74d6dbbe409eb99546a7b0a02b2782f9021d
- https://git.kernel.org/stable/c/931cd1d1baeae68e8eb2c23bc1f3d8934dca6241
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.