CVE-2026-63946

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-63946

Key Details

CVE	CVE-2026-63946
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-63946
CVE	https://www.cve.org/CVERecord?id=CVE-2026-63946

Source

Reference

NVD

CVE