{"id":"EM-20261102-BXLU","url":"https://cyber.eventmonitor.net/incident/EM-20261102-BXLU/","type":"cve","title":"Linux Kernel Vulnerability (CVE-2026-99239)","subtitle":"CVE-2026-99239","subject":"CVE-2026-99239","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-02T16:17:49.540Z","firstSignal":"2026-11-02T16:06:43.000Z","lastSignal":"2026-11-02T16:17:49.540Z","updated":"2026-11-04T14:43:58.877Z","revision":1,"life":[{"status":"Born","at":"2026-11-02T16:17:49.540Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-02T16:17:49.540Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-02T16:06:43.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-02T16:17:49.540Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261102-BXLU created."}],"stages":[{"name":"Disclosed","at":"2026-11-02T16:17:49.540Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-02T16:17:49.540Z","detail":"CVSS 7.8 · EPSS 0.1%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-02T16:06:43.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-02T16:06:43.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-99239 (important)","text":"kernel: kernel: Privilege escalation via race condition in Bluetooth L2CAP","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-99239.json"},{"at":"2026-11-02T16:17:49.540Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-99239 (CVSS 7.8)","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: refuse __l2cap_chan_add if chan already has conn\n\nl2cap_chan may be linked to l2cap_conn at most once. This is assumed in\nseveral places, eg l2cap_chan_del cleanup.\n\nThere is a TOCTOU race where the invariant is violated:\n\n    [Task 1]                          [Task 2]\n    l2cap_chan_connect                l2cap_sock_bind\n      l2cap_chan_lock                   lock_sock\n      l2cap_state_change                if (sk->sk_state != BT_OPEN)\n        chan->state = BT_CONNECT\n        l2cap_sock_state_change_cb   ","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99239"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-02T16:17:49.540","score":7.8,"severity":"HIGH","desc":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: refuse __l2cap_chan_add if chan already has conn\n\nl2cap_chan may be linked to l2cap_conn at most once. This is assumed in\nseveral places, eg l2cap_chan_del cleanup.\n\nThere is a TOCTOU race where the invariant is v","product":"","seen":1793803438877},"kev":null,"epss":{"epss":0.00126,"pct":0.02302,"at":1793803438877},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}