{"id":"CVE-2026-80539","summary":"drm/amdgpu: disallow multiple FENCE chunks in one submit","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: disallow multiple FENCE chunks in one submit\n\namdgpu_cs_pass1() dispatches on chunk_id once per chunk without\nrejecting repeated ids. p-\u003euf_bo is a single-slot field, so a\nsubmission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs\namdgpu_cs_p1_user_fence() twice, and the second run overwrites\np-\u003euf_bo with a freshly referenced BO without dropping the reference\ntaken by the first.\n\namdgpu_cs_parser_fini() only unrefs the final p-\u003euf_bo, so every FENCE\nchunk but the last leaks a BO reference. The leaked BO outlives handle\nclose and process exit.\n\nReject duplicate FENCE chunks the same way commit fec5f8e8c6bc\n(\"drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit\") did\nfor p-\u003ebo_list.\n\n(cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)","modified":"2026-08-28T03:47:28.910004188Z","published":"2026-08-26T14:37:13.367Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80539.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/070229262ede37d17c4ea596650deb6e5eb5d106"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5f46322e0b84af29e10eb951ff45bd6ea40640de"},{"type":"WEB","url":"https://git.kernel.org/stable/c/71aa45f7bfe46fbc6f51e7832573ff49b6005fea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e9954e7212042ec808b06181b365b14f00c6f0a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/931cd1d1baeae68e8eb2c23bc1f3d8934dca6241"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e3ee74d6dbbe409eb99546a7b0a02b2782f9021d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80539.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80539"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21"},{"fixed":"7e9954e7212042ec808b06181b365b14f00c6f0a"},{"fixed":"070229262ede37d17c4ea596650deb6e5eb5d106"},{"fixed":"5f46322e0b84af29e10eb951ff45bd6ea40640de"},{"fixed":"71aa45f7bfe46fbc6f51e7832573ff49b6005fea"},{"fixed":"e3ee74d6dbbe409eb99546a7b0a02b2782f9021d"},{"fixed":"931cd1d1baeae68e8eb2c23bc1f3d8934dca6241"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80539.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0"},{"fixed":"6.1.185"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.153"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.105"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.46"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80539.json"}}],"schema_version":"1.9.0"}