{"schema":"threatline.record/2","record":{"id":"CVE-2026-93251","aliases":[],"summary":"ACPI: bus: Introduce acpi_bus_get_primary_device()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: bus: Introduce acpi_bus_get_primary_device()\n\nThe function used for obtaining the first \"physical\" device for which\nthe given ACPI one is the ACPI companion, acpi_get_first_physical_node(),\nmay return a stale device pointer (mostly in theory) because\nacpi_unbind_one() may run as a whole after dropping the ACPI device's\nphysical_node_lock in acpi_get_first_physical_node() and before it\nreturns.  The last reference to the \"physical\" device may be dropped\nthen before the pointer to it is returned to the caller.\n\nIf that happens and the acpi_get_first_physical_node() caller invokes\nget_device() on the pointer obtained from it, which is done by the\nmajority of its callers, a use-after-free will occur.\n\nTo prepare for addressing this problem, introduce a new function for\ngetting the first \"physical\" device associated with the given ACPI one\n(the \"primary physical device\") that will also reference count the\ndevice in question before returning a pointer to it.\n\nMake that new function and acpi_get_first_physical_node() share the\nphysical node list lookup code.\n\nNo intentional functional impact.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93251","source_modified_at":"2026-10-21T12:52:30.596Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"91e5687805885f9fceb60b95e950a3d3bdcf4764","lessThan":"50ddd82b88b1d1cc467b5df953344c1a9feec268","status":"affected","versionType":"git"},{"version":"91e5687805885f9fceb60b95e950a3d3bdcf4764","lessThan":"fd4f907b558721716da30acd6630191acf811b95","status":"affected","versionType":"git"},{"version":"91e5687805885f9fceb60b95e950a3d3bdcf4764","lessThan":"ebdd932dc24c1cf7cc31710b7730515e4e66d886","status":"affected","versionType":"git"},{"version":"91e5687805885f9fceb60b95e950a3d3bdcf4764","lessThan":"5657859851abb65105220a6cdb5804926249f714","status":"affected","versionType":"git"},{"version":"91e5687805885f9fceb60b95e950a3d3bdcf4764","lessThan":"72530e1f72b0515a73fd88292254d04fecf03649","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93251","source_modified_at":"2026-10-21T12:52:30.596Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.8","status":"affected"},{"version":"0","lessThan":"3.8","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.114","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","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-2026-93251","source_modified_at":"2026-10-21T12:52:30.596Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"50ddd82b88b1d1cc467b5df953344c1a9feec268","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93251","source_modified_at":"2026-10-21T12:52:30.596Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5657859851abb65105220a6cdb5804926249f714","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93251","source_modified_at":"2026-10-21T12:52:30.596Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"72530e1f72b0515a73fd88292254d04fecf03649","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.002,"percentile":0.09371,"score_date":"2026-10-23"},"published_at":"2026-09-24T15:51:27.511Z","modified_at":"2026-10-21T12:52:30.596Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93251","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:52:30.596Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93251","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/50ddd82b88b1d1cc467b5df953344c1a9feec268"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/fd4f907b558721716da30acd6630191acf811b95"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ebdd932dc24c1cf7cc31710b7730515e4e66d886"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5657859851abb65105220a6cdb5804926249f714"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/72530e1f72b0515a73fd88292254d04fecf03649"}],"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":"2026-10-21T12:52:30.596Z","content_hash":"4c8f38742101dc6f2da5feeef73529c279dd067bc1225746a6a514d5a37f2622"}}