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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-63946 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568 kernel.org
https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9 kernel.org
https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878 kernel.org
https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731 kernel.org
https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd kernel.org
https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-63946
NVD Published Date:
07/19/2026
NVD Last Modified:
07/20/2026
Source:
kernel.org