{"schema":"threatline.record/2","record":{"id":"CVE-2026-99209","aliases":[],"summary":"drm/xe: skip eviction of a BO with no resource","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: skip eviction of a BO with no resource\n\nxe_evict_flags() switches on tbo->resource->mem_type to choose an\neviction placement. An xe BO can reach eviction with no ttm.resource,\ne.g. an imported dma-buf BO whose resource was freed during teardown\nwhile its attachment is still live: the exporter then invalidates it via\nxe_dma_buf_move_notify() -> xe_bo_evict(), and the switch dereferences a\nNULL resource and faults.\n\nA BO with no resource has nothing placed or mapped, so there is nothing\nto evict. Return an empty placement (num_placement = 0), mirroring the\nhandling already used for non-xe scatter-gather BOs just above;\nttm_bo_validate() then takes the pipeline-gutting path and returns 0.\n\nWithout the fix the xe_dma_buf@xe_test_dmabuf_move_notify_no_resource\ndynamic live selftest will fail with below stack.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000010\nRIP: 0010:xe_evict_flags+0xf4/0x140 [xe]\nCall Trace:\n <TASK>\n xe_bo_evict+0x40/0xa0 [xe]\n ? ttm_bo_pipeline_gutting+0x71/0x180 [ttm]\n xe_test_dmabuf_move_notify_no_resource+0x182/0x440 [xe]\n xe_dma_buf_kunit+0x387/0x580 [xe]\n\nv2: Add Fixes tag and failure info in commit text (Matt Brost)\n\n(cherry picked from commit dbcfaac6331f1fcb0c2fe3ad3e9adb1e5d43ec0c)","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99209","source_modified_at":"2026-10-28T10:36:03.274Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"Linux","vendor":"Linux","versions":[{"version":"dd08ebf6c3525a7ea2186e636df064ea47281987","lessThan":"6046bb9cb2859e3d9bf939e4d6527f3827e1096f","status":"affected","versionType":"git"},{"version":"dd08ebf6c3525a7ea2186e636df064ea47281987","lessThan":"b6499d19ade1f1e4a1e6b739abc8c815297c98b8","status":"affected","versionType":"git"},{"version":"dd08ebf6c3525a7ea2186e636df064ea47281987","lessThan":"448e76cbdc6652ccd3ba337b7a6e1f028859f2ed","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99209","source_modified_at":"2026-10-28T10:36:03.274Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.18.59","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.13","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-2026-99209","source_modified_at":"2026-10-28T10:36:03.274Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"6046bb9cb2859e3d9bf939e4d6527f3827e1096f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99209","source_modified_at":"2026-10-28T10:36:03.274Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"448e76cbdc6652ccd3ba337b7a6e1f028859f2ed","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T10:36:03.274Z","modified_at":"2026-10-28T10:36:03.274Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99209","fetched_at":"2026-10-28T15:55:58.673066Z","source_modified_at":"2026-10-28T10:36:03.274Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/6046bb9cb2859e3d9bf939e4d6527f3827e1096f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b6499d19ade1f1e4a1e6b739abc8c815297c98b8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/448e76cbdc6652ccd3ba337b7a6e1f028859f2ed"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-28T10:36:03.274Z","content_hash":"c2693db1266496c04728ba0dc629f0e2d3120df18e52cceed6ce654d8bdc7481"}}