linux-cve-announce - CVE-2025-40141: Bluetooth: ISO: Fix possible UAF on iso_conn

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Message-ID: <2025111256-CVE-2025-40141-072e@gregkh>
Date: Wed, 12 Nov 2025 19:24:17 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-40141: Bluetooth: ISO: Fix possible UAF on iso_conn_free

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: Fix possible UAF on iso_conn_free

This attempt to fix similar issue to sco_conn_free where if the
conn->sk is not set to NULL may lead to UAF on iso_conn_free.

The Linux kernel CVE team has assigned CVE-2025-40141 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.0 with commit ccf74f2390d60a2f9a75ef496d2564abb478f46a and fixed in 6.1.156 with commit eba6d787ec117a5d2c60f9644e0a39c18542b6be
	Issue introduced in 6.0 with commit ccf74f2390d60a2f9a75ef496d2564abb478f46a and fixed in 6.6.112 with commit 5319145a07d8bf5b0782b25cb3115825689d42bb
	Issue introduced in 6.0 with commit ccf74f2390d60a2f9a75ef496d2564abb478f46a and fixed in 6.12.53 with commit 80689777919f02328eb873769de4647c9dd3e371
	Issue introduced in 6.0 with commit ccf74f2390d60a2f9a75ef496d2564abb478f46a and fixed in 6.17.3 with commit c92ad1a155ccfa38b87bd1d998287e1c0a24248d
	Issue introduced in 6.0 with commit ccf74f2390d60a2f9a75ef496d2564abb478f46a and fixed in 6.18-rc1 with commit 9950f095d6c875dbe0c9ebfcf972ec88fdf26fc8

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-40141
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	net/bluetooth/iso.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/eba6d787ec117a5d2c60f9644e0a39c18542b6be
	https://git.kernel.org/stable/c/5319145a07d8bf5b0782b25cb3115825689d42bb
	https://git.kernel.org/stable/c/80689777919f02328eb873769de4647c9dd3e371
	https://git.kernel.org/stable/c/c92ad1a155ccfa38b87bd1d998287e1c0a24248d
	https://git.kernel.org/stable/c/9950f095d6c875dbe0c9ebfcf972ec88fdf26fc8