CVE-2026-63946Bluetooth: ISO: fix UAF in iso_recv_frame
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ccf74f2390d60a2f9a75ef496d2564abb478f46a before c57ea90f203c8b8b41a474f19a09000d0f841436; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 119fb6f80c44dc1c65d604cf28e64c56bd9b6568; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before b04ec131325baf4ea4577d6c6e6b86cf092e3731; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before c318aa51830a3d2cc1229968fe521441c97356cd; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 1a6b803b00ccdd7666506adbe01ddae1c72d1ca9; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 47f23a259517abbdb8032c057a1e8a6bf3734878 | CNA record |
References
- https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436
- https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568
- https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731
- https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd
- https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9
- https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.