{"schema_version":"1.9.0","id":"CVE-2026-63946","published":"2026-07-19T14:55:40.577Z","modified":"2026-08-31T18:26:04.448507637Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:3595-1","SUSE-SU-2026:3602-1","SUSE-SU-2026:3617-1","SUSE-SU-2026:3790-1","SUSE-SU-2026:3810-1","openSUSE-SU-2026:21555-1"],"summary":"Bluetooth: ISO: fix UAF in iso_recv_frame","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix UAF in iso_recv_frame\n\niso_recv_frame reads conn->sk under iso_conn_lock but releases the lock\nbefore using sk, with no reference held. A concurrent iso_sock_kill()\ncan free sk in that window, causing use-after-free on sk->sk_state and\nsock_queue_rcv_skb().\n\nFix by replacing the bare pointer read with iso_sock_hold(conn), which\ncalls sock_hold() while the spinlock is held, atomically elevating the\nrefcount before the lock drops. Add a drop_put label so sock_put() is\ncalled on all exit paths where the hold succeeded.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ccf74f2390d60a2f9a75ef496d2564abb478f46a"},{"fixed":"c57ea90f203c8b8b41a474f19a09000d0f841436"},{"fixed":"119fb6f80c44dc1c65d604cf28e64c56bd9b6568"},{"fixed":"b04ec131325baf4ea4577d6c6e6b86cf092e3731"},{"fixed":"c318aa51830a3d2cc1229968fe521441c97356cd"},{"fixed":"1a6b803b00ccdd7666506adbe01ddae1c72d1ca9"},{"fixed":"47f23a259517abbdb8032c057a1e8a6bf3734878"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63946.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.93"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63946.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63946.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63946"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63946.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}