{"id":"CVE-2026-89800","summary":"drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE\n\nA successful OP_UNMAP_SPARSE marks its region dirty with\nnouveau_uvma_region_dirty() and defers the teardown to\nnouveau_uvmm_bind_job_cleanup(); it does not remove the region from\nuvmm-\u003eregion_mt.\n\nIf a later op in the job fails, the unwind path never clears reg-\u003edirty\n(set in one place, cleared nowhere) and sets op-\u003ereg = NULL, so cleanup\nskips the teardown. The region is left in the tree with dirty set and its\ncompletion never signalled. Later binds over that range then fail\npermanently -- -ENOENT or -EINVAL from the dirty checks, or an unkillable\nwait_for_completion() in bind_validate_region() -- for the lifetime of\nthe uvmm.\n\nClear reg-\u003edirty when the unwind reverts the sparse unmap, restoring the\nregion to the state it was found in.","modified":"2026-09-17T03:47:09.903202884Z","published":"2026-09-16T10:30:33.097Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89800.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1101cbfe7f342e5eaaf7444965d4f1215abdac4c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/196ce9e5e93202da097062be24e404984dbc5ac2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/38a62306c4266bcb3cd89e33c7111ee33096ebb3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a129b2b875c148aba233ace8447a0c36ca3bae07"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c60033c172420179b7bbb3d1f843f8dc90164dc5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89800.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89800"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b88baab828713ce0b49b185444b2ee83bed373a8"},{"fixed":"a129b2b875c148aba233ace8447a0c36ca3bae07"},{"fixed":"196ce9e5e93202da097062be24e404984dbc5ac2"},{"fixed":"1101cbfe7f342e5eaaf7444965d4f1215abdac4c"},{"fixed":"c60033c172420179b7bbb3d1f843f8dc90164dc5"},{"fixed":"38a62306c4266bcb3cd89e33c7111ee33096ebb3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89800.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89800.json"}}],"schema_version":"1.9.0"}