CVE-2026-63946
CVE CVE-2026-63946EUVD EUVD-2026-45719Published 2026-07-19T14:55:40.000ZLast changed 2026-08-05T12:37:33.000ZCVSS 8.8
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux ccf74f2390d60a2f9a75ef496d2564abb478f46a <c57ea90f203c8b8b41a474f19a09000d0f841436; patch: 6.1.176; ccf74f2390d60a2f9a75ef496d2564abb478f46a <b04ec131325baf4ea4577d6c6e6b86cf092e3731; patch: 6.6.143; ccf74f2390d60a2f9a75ef496d2564abb478f46a <47f23a259517abbdb8032c057a1e8a6bf3734878; 6.0; patch: 7.0.12; patch: 6.18.35; ccf74f2390d60a2f9a75ef496d2564abb478f46a <c318aa51830a3d2cc1229968fe521441c97356cd; patch: 7.1; ccf74f2390d60a2f9a75ef496d2564abb478f46a <119fb6f80c44dc1c65d604cf28e64c56bd9b6568; patch: 6.12.93; ccf74f2390d60a2f9a75ef496d2564abb478f46a <1a6b803b00ccdd7666506adbe01ddae1c72d1ca9; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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