{"id":"CVE-2026-68271","state":"PUBLISHED","title":"drm/nouveau: fix reversed error cleanup order in ucopy functions","description":"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->in_sync.s.\n\nSince args->in_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.","publishedAt":"2026-08-10T12:01:46.534Z","updatedAt":"2026-08-17T05:02:04.681Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"2473ac314387a5def7244eb6d6a345934ed140bf","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"e15c25c7972d38a9f6bf8c3f7f29179a67263eba","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"4e109faa9ea2b6c04cc5a99e76db3126575a59d1","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"ebbaf64d2635d1e78196c067fa8fa582a7dc17f7","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"ab99ead646b1b833ecd57fe577a2816f2e848167","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/nouveau/nouveau_exec.c","drivers/gpu/drm/nouveau/nouveau_uvmm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/nouveau/nouveau_exec.c","drivers/gpu/drm/nouveau/nouveau_uvmm.c"]}],"references":["https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf","https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba","https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1","https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7","https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68271.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68271","state":"PUBLISHED","datePublished":"2026-08-10T12:01:46.534Z","dateUpdated":"2026-08-17T05:02:04.681Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.378Z"},"containers":{"cna":{"title":"drm/nouveau: fix reversed error cleanup order in ucopy functions","descriptions":[{"lang":"en","value":"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->in_sync.s.\n\nSince args->in_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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"2473ac314387a5def7244eb6d6a345934ed140bf","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"e15c25c7972d38a9f6bf8c3f7f29179a67263eba","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"4e109faa9ea2b6c04cc5a99e76db3126575a59d1","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"ebbaf64d2635d1e78196c067fa8fa582a7dc17f7","versionType":"git"},{"version":"b88baab828713ce0b49b185444b2ee83bed373a8","status":"affected","lessThan":"ab99ead646b1b833ecd57fe577a2816f2e848167","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/nouveau/nouveau_exec.c","drivers/gpu/drm/nouveau/nouveau_uvmm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/nouveau/nouveau_exec.c","drivers/gpu/drm/nouveau/nouveau_uvmm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf"},{"url":"https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba"},{"url":"https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1"},{"url":"https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"},{"url":"https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:02:04.681Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}