{"cve":"CVE-2026-63946","nvd":{"published":"2026-07-19T16:17:13.223","modified":"2026-10-19T21:17:13.800","status":"Undergoing Analysis","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568","https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9","https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878","https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731","https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-63946","score":0.00338,"percentile":0.26927,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}