{"id":"CVE-2026-68271","summary":"drm/nouveau: fix reversed error cleanup order in ucopy functions","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: fix reversed error cleanup order in ucopy functions\n\nnouveau_uvmm_vm_bind_ucopy() and nouveau_exec_ucopy() place their error\ncleanup labels in allocation order rather than reverse allocation order.\nOn a u_memcpya() failure for in_sync.s, the goto to err_free_ops (or\nerr_free_pushs) frees the first allocation and then falls through to\nerr_free_ins, which calls u_free() on args-\u003ein_sync.s.\n\nSince args-\u003ein_sync.s still holds the ERR_PTR returned by the failed\nu_memcpya(), and ERR_PTR values are not caught by ZERO_OR_NULL_PTR(),\nkvfree() proceeds to dereference it, which can result in a kernel oops.\nA failure for out_sync.s instead jumps to err_free_ins and skips freeing\nthe first allocation, leading to a memory leak.\n\nFix by swapping the cleanup label order so resources are freed in the\ncorrect reverse allocation sequence.","modified":"2026-08-12T04:19:22.256809982Z","published":"2026-08-10T12:01:46.534Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68271.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68271.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68271"},{"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":"b88baab828713ce0b49b185444b2ee83bed373a8"},{"fixed":"2473ac314387a5def7244eb6d6a345934ed140bf"},{"fixed":"e15c25c7972d38a9f6bf8c3f7f29179a67263eba"},{"fixed":"4e109faa9ea2b6c04cc5a99e76db3126575a59d1"},{"fixed":"ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"},{"fixed":"ab99ead646b1b833ecd57fe577a2816f2e848167"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68271.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68271.json"}}],"schema_version":"1.9.0"}