{"id":"CVE-2026-80576","summary":"drm/amdgpu: reject oversized IBs with per-ring packet limits","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: reject oversized IBs with per-ring packet limits\n\nOn GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through\nto ib-\u003elength_dw without a limit, while ring_emit_ib() encodes length\ninto packet fields. Oversized values can corrupt adjacent control bits\nand destabilize command submission.\n\nAdd a per-ring IB packet size limit helper and reject command\nsubmissions exceeding the corresponding dword limit before IB\nallocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE,\nand apply the MM fallback limit for other ring types.\n\n(cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)","modified":"2026-08-28T03:47:29.321128694Z","published":"2026-08-26T14:37:35.538Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80576.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/07fe270ec07c138a70afe7a81e115a85c35c545c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1474f3970d1afd303e12ff14d06808eabb371576"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e164ba1057175fb8a370d8e05cbff5c57eac0c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd37f9dd5b5ab70a46fa7bc76623c0528d602b27"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80576.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80576"},{"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":"6e164ba1057175fb8a370d8e05cbff5c57eac0c8"},{"fixed":"1474f3970d1afd303e12ff14d06808eabb371576"},{"fixed":"07fe270ec07c138a70afe7a81e115a85c35c545c"},{"fixed":"fd37f9dd5b5ab70a46fa7bc76623c0528d602b27"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80576.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0"},{"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-2026-80576.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}