linux-cve-announce - CVE-2025-21937: Bluetooth: Add check for mgmt_alloc_skb() in mgmt_remote

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Message-ID: <2025040134-CVE-2025-21937-90a8@gregkh>
Date: Tue,  1 Apr 2025 16:40:01 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21937: Bluetooth: Add check for mgmt_alloc_skb() in mgmt_remote_name()

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

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

Bluetooth: Add check for mgmt_alloc_skb() in mgmt_remote_name()

Add check for the return value of mgmt_alloc_skb() in
mgmt_remote_name() to prevent null pointer dereference.

The Linux kernel CVE team has assigned CVE-2025-21937 to this issue.


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

	Issue introduced in 5.18 with commit ba17bb62ce415950753c19d16bb43b2bd3701158 and fixed in 6.1.131 with commit 37785a01040cb5d11ed0ddbcbf78491fcd073161
	Issue introduced in 5.18 with commit ba17bb62ce415950753c19d16bb43b2bd3701158 and fixed in 6.6.83 with commit c5845c73cbacf5704169283ef29ca02031a36564
	Issue introduced in 5.18 with commit ba17bb62ce415950753c19d16bb43b2bd3701158 and fixed in 6.12.19 with commit 88310caff68ae69d0574859f7926a59c1da2d60b
	Issue introduced in 5.18 with commit ba17bb62ce415950753c19d16bb43b2bd3701158 and fixed in 6.13.7 with commit 69fb168b88e4d62cb31cdd725b67ccc5216cfcaf
	Issue introduced in 5.18 with commit ba17bb62ce415950753c19d16bb43b2bd3701158 and fixed in 6.14 with commit f2176a07e7b19f73e05c805cf3d130a2999154cb
	Issue introduced in 5.17.2 with commit 0f526a6d3e9347d94c2c0b5292a3cb3b25115019

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-2025-21937
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/mgmt.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/37785a01040cb5d11ed0ddbcbf78491fcd073161
	https://git.kernel.org/stable/c/c5845c73cbacf5704169283ef29ca02031a36564
	https://git.kernel.org/stable/c/88310caff68ae69d0574859f7926a59c1da2d60b
	https://git.kernel.org/stable/c/69fb168b88e4d62cb31cdd725b67ccc5216cfcaf
	https://git.kernel.org/stable/c/f2176a07e7b19f73e05c805cf3d130a2999154cb