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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-63946

Bluetooth: ISO: fix UAF in iso_recv_frame

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ccf74f2390d60a2f9a75ef496d2564abb478f46a to < c57ea90f203c8b8b41a474f19a09000d0f841436affected
  • ccf74f2390d60a2f9a75ef496d2564abb478f46a to < 119fb6f80c44dc1c65d604cf28e64c56bd9b6568affected
  • ccf74f2390d60a2f9a75ef496d2564abb478f46a to < b04ec131325baf4ea4577d6c6e6b86cf092e3731affected
  • ccf74f2390d60a2f9a75ef496d2564abb478f46a to < c318aa51830a3d2cc1229968fe521441c97356cdaffected
  • ccf74f2390d60a2f9a75ef496d2564abb478f46a to < 1a6b803b00ccdd7666506adbe01ddae1c72d1ca9affected
  • ccf74f2390d60a2f9a75ef496d2564abb478f46a to < 47f23a259517abbdb8032c057a1e8a6bf3734878affected

Linux Linux

Default version status: affected

  • 6.0affected
  • 0 to < 6.0unaffected
  • 6.1.176 to ≤ 6.1.*unaffected
  • 6.6.143 to ≤ 6.6.*unaffected
  • 6.12.93 to ≤ 6.12.*unaffected
  • 6.18.35 to ≤ 6.18.*unaffected
  • 7.0.12 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References