{"schema":"threatline.record/2","record":{"id":"CVE-2026-98180","aliases":[],"summary":"drm/msm: RCU-free the scheduler-containing ring and VM objects","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: RCU-free the scheduler-containing ring and VM objects\n\nBoth struct msm_ringbuffer and struct msm_gem_vm embed a struct\ndrm_gpu_scheduler.  msm_ringbuffer_destroy() and the VM free callback\nmsm_gem_vm_free() call drm_sched_fini() on the embedded scheduler and then\nfree the containing object with plain kfree().\n\ndrm_sched_fence_get_timeline_name() returns fence->sched->name, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling.  A finished fence exported to userspace (the submit out-fence, or\na VM_BIND fence, via sync_file / drm_syncobj) keeps pointing at the embedded\nscheduler after the ring/VM is freed, so a later get_timeline_name() --\nreachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed slab\nmemory (KASAN slab-use-after-free read).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period.  Free the scheduler-containing\nobjects with kfree_rcu() instead of kfree().\n\nPatchwork: https://patchwork.freedesktop.org/patch/750234/","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98180","source_modified_at":"2026-10-19T09:15:11.540Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"1d8a5ca436ee4a28eec14cb813f790f7cdeeee19","lessThan":"d81bf4581903b0cba0698cd4d1c07fc6be21754a","status":"affected","versionType":"git"},{"version":"1d8a5ca436ee4a28eec14cb813f790f7cdeeee19","lessThan":"713abac5c04ccbae67f9ac68c3921845535388e7","status":"affected","versionType":"git"},{"version":"1d8a5ca436ee4a28eec14cb813f790f7cdeeee19","lessThan":"01c8d1f385f788f1bbbbb7687c4386d614281218","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98180","source_modified_at":"2026-10-19T09:15:11.540Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98180","source_modified_at":"2026-10-19T09:15:11.540Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"713abac5c04ccbae67f9ac68c3921845535388e7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98180","source_modified_at":"2026-10-19T09:15:11.540Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"01c8d1f385f788f1bbbbb7687c4386d614281218","basis":"first unaffected version stated in the CVE record"}],"cvss":7.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.0012,"percentile":0.01742,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:44:23.327Z","modified_at":"2026-10-19T09:15:11.540Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98180","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:15:11.540Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98180","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/d81bf4581903b0cba0698cd4d1c07fc6be21754a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/713abac5c04ccbae67f9ac68c3921845535388e7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/01c8d1f385f788f1bbbbb7687c4386d614281218"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:15:11.540Z","content_hash":"e649d8b7714f925f80d508b83297e66e5b299ca80d05d23485277718bd08f157"}}