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CVE-2026-63946

8.8 high SSVC exploitation: none Analyzed
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix UAF in iso_recv_frame iso_recv_frame reads conn->sk under iso_conn_lock but releases the lock before using sk, with no reference held. A concurrent iso_sock_kill() can free sk in that window, causing use-after-free on sk->sk_state and sock_queue_rcv_skb(). Fix by replacing the bare pointer read with iso_sock_hold(conn), which calls sock_hold() while the spinlock is held, atomically elevating the refcount before the lock drops. Add a drop_put label so sock_put() is called on all exit paths where the hold succeeded.

Fix

Patch, vendor advisory and mitigation references on NVD 6

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 6

  1. CwesCWE-416 → CWE-362, CWE-416NVD modified 2026-10-28 18:03
  2. Cpes+6 CPE criteria (now 6)NVD modified 2026-10-28 18:03
  3. StatusPublished → AnalyzedNVD modified 2026-10-28 18:03
  4. StatusAwaiting Analysis → PublishedNVD modified 2026-10-19 20:17
  5. CwesCWE-416NVD modified 2026-10-19 21:17
  6. First seenCVSS 8.8NVD modified 2026-10-16 16:18

Affected (CPE criteria) 6

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*

References 6