{"id":"CVE-2026-63945","revision":null,"records":[{"revision":"68c80d128dec47cd8186dc99bdfa3ee9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63945","aliases":[],"title":"Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: serialize iso_sock_clear_timer with socket lock\n\niso_sock_close() calls iso_sock_clear_timer() before acquiring\nlock_sock(sk).\n\niso_sock_clear_timer() reads iso_pi(sk)->conn twice without the\nsocket lock held:\n\n if (!iso_pi(sk)->conn)\n return;\n cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);\n\nConcurrently, iso_conn_del() executes under lock_sock(sk) and calls\niso_chan_del(), which sets iso_pi(sk)->conn to NULL and may result in\nthe final reference to the connection being dropped:\n\n CPU0 CPU1\n ---- ----\n iso_sock_clear_timer()\n if (conn != NULL) ... lock_sock(sk)\n iso_chan_del()\n iso_pi(sk)->conn = NULL\n cancel_delayed_work(conn) /* NULL deref or UAF */\n\niso_pi(sk)->conn is not stable across the unlock window, causing a\nNULL pointer dereference or use-after-free.\n\nSerialize iso_sock_clear_timer() with the socket lock by moving it\ninside lock_sock()/release_sock(), matching the pattern used in\niso_conn_del() and all other call sites.","state":0,"publishedAt":"2026-07-19T14:55:39.859+00:00","modifiedAt":"2026-10-19T20:17:58.555+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bluetooth/iso.c\"\n ],\n \"versions\": [\n {\n \"version\": \"ccf74f2390d60a2f9a75ef496d2564abb478f46a\",\n \"lessThan\": \"d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ccf74f2390d60a2f9a75ef496d2564abb478f46a\",\n \"lessThan\": \"35f68f36d9883d56dec21cf85f7556d4657fc393\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ccf74f2390d60a2f9a75ef496d2564abb478f46a\",\n \"lessThan\": \"996c2104d0726a8fe584f85b3d6327197374a348\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ccf74f2390d60a2f9a75ef496d2564abb478f46a\",\n \"lessThan\": \"bc08c15746f25f41dd0508b25780d1e84acbb2ef\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ccf74f2390d60a2f9a75ef496d2564abb478f46a\",\n \"lessThan\": \"51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ccf74f2390d60a2f9a75ef496d2564abb478f46a\",\n \"lessThan\": \"4b5f8e608749b7e8fa386c6e4301cf9272595859\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bluetooth/iso.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.0\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.0\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.176\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.93\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.35\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.12\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa","https://git.kernel.org/stable/c/35f68f36d9883d56dec21cf85f7556d4657fc393","https://git.kernel.org/stable/c/996c2104d0726a8fe584f85b3d6327197374a348","https://git.kernel.org/stable/c/bc08c15746f25f41dd0508b25780d1e84acbb2ef","https://git.kernel.org/stable/c/51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5","https://git.kernel.org/stable/c/4b5f8e608749b7e8fa386c6e4301cf9272595859"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63945","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63945","identifiers":["CVE-2026-63945"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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