{"schema":"threatline.record/2","record":{"id":"CVE-2026-99013","aliases":[],"summary":"Bluetooth: ISO: Reject concurrent BIS listener setup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Reject concurrent BIS listener setup\n\niso_sock_listen() drops the socket lock before calling iso_listen_bis()\nto preserve the hdev->lock ordering. Two concurrent listen() calls on\nthe same broadcast socket can therefore both observe BT_BOUND. Caller\nA can attach connA and release the locks, then caller B can acquire\nthem and attach connB before A publishes BT_LISTEN.\n\n__iso_chan_add() checks whether connB already has a socket, but not\nwhether the socket already has a connection. The second attachment\noverwrites iso_pi(sk)->conn, leaking the connA reference and leaving\nconnA->sk intact. Socket teardown follows connB, so later events on\nconnA can cause a stale socket access.\n\nRecheck BT_BOUND and require iso_pi(sk)->conn to be NULL after taking\nboth the HCI device and socket locks in iso_listen_bis(). The connection\ncheck also covers the interval between attachment and publication of\nBT_LISTEN. Reject a competing setup with -EBADFD through the existing\nunlock path before allocating another connection.\n\nA recorded KASAN report from an instrumented kernel shows:\n\n  BUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0\n  Call Trace:\n   iso_sock_hold+0x119/0x1f0\n   iso_conn_del+0xe4/0x270\n   hci_disconn_complete_evt+0x351/0x8c0\n   hci_event_packet+0x71b/0xb20\n   hci_rx_work+0x293/0x730\n\n  Allocated by task 93:\n   sk_prot_alloc+0x113/0x220\n   sk_alloc+0x2b/0x6d0\n   bt_sock_alloc+0x29/0x370\n   iso_sock_alloc.constprop.0+0x19/0x300\n   iso_sock_create+0x94/0x100\n\n  Freed by task 93:\n   kfree+0x121/0x3c0\n   __sk_destruct+0x42b/0x540\n   iso_sock_release+0x29d/0x340\n   __sock_release+0xa1/0x260\n   sock_close+0x10/0x20","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"c541d7b5e17987ed330798b07d4ad508859c1c93","lessThan":"559e4d2b6f83aaa96061659cc7104b7a0293f9ef","status":"affected","versionType":"git"},{"version":"168e28305b871d8ec604a8f51f35467b8d7ba05b","lessThan":"90b744066ca520d1a6a505a11ade9c9a5f48accf","status":"affected","versionType":"git"},{"version":"168e28305b871d8ec604a8f51f35467b8d7ba05b","lessThan":"79993e9919a87068183ba3622c383f05c049c4bc","status":"affected","versionType":"git"},{"version":"168e28305b871d8ec604a8f51f35467b8d7ba05b","lessThan":"555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3","status":"affected","versionType":"git"},{"version":"6.12.6","lessThan":"6.12.113","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.13","status":"affected"},{"version":"0","lessThan":"6.13","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","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-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"559e4d2b6f83aaa96061659cc7104b7a0293f9ef","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"90b744066ca520d1a6a505a11ade9c9a5f48accf","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"79993e9919a87068183ba3622c383f05c049c4bc","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","source_modified_at":"2026-10-23T12:20:38.612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"6.12.113","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":"2026-10-23T12:20:38.612Z","modified_at":"2026-10-23T12:20:38.612Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99013","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:20:38.612Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/559e4d2b6f83aaa96061659cc7104b7a0293f9ef"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/90b744066ca520d1a6a505a11ade9c9a5f48accf"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/79993e9919a87068183ba3622c383f05c049c4bc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3"}],"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":"2026-10-23T12:20:38.612Z","content_hash":"6e70ddd2f4fe1eb802bf2f92e37de5dd2933eed6fa73367a209785372805139e"}}