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Vulnerabilities CVE-2026-63946

CVE-2026-63946

None
Open
TLP:CLEAR

Bluetooth: ISO: fix UAF in iso_recv_frame

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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.

Details

EPSS Score
0.33%

25.4th percentile

Confidence
90%
Published
Jul 19, 2026
Last Modified
Jul 19, 2026
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