linux-cve-announce - CVE-2025-38304: Bluetooth: Fix NULL pointer deference on eir_get_service

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Message-ID: <2025071013-CVE-2025-38304-d021@gregkh>
Date: Thu, 10 Jul 2025 09:42:45 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38304: Bluetooth: Fix NULL pointer deference on eir_get_service_data

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

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

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

Bluetooth: Fix NULL pointer deference on eir_get_service_data

The len parameter is considered optional so it can be NULL so it cannot
be used for skipping to next entry of EIR_SERVICE_DATA.

The Linux kernel CVE team has assigned CVE-2025-38304 to this issue.


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

	Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.1.142 with commit 497c9d2d7d3983826bb02c10fb4a5818be6550fb
	Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.6.94 with commit 4bf29910570666e668a60d953f8da78e95bb7fa2
	Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.12.34 with commit 842f7c3154d5b25ca11753c02ee8cf6ee64c0142
	Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.15.3 with commit 7d99cc0f8e6fa0f35570887899f178122a61d44e
	Issue introduced in 5.19 with commit 8f9ae5b3ae80f168a6224529e3787f4fb27f299a and fixed in 6.16-rc2 with commit 20a2aa01f5aeb6daad9aeaa7c33dd512c58d81eb

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-2025-38304
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/eir.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/497c9d2d7d3983826bb02c10fb4a5818be6550fb
	https://git.kernel.org/stable/c/4bf29910570666e668a60d953f8da78e95bb7fa2
	https://git.kernel.org/stable/c/842f7c3154d5b25ca11753c02ee8cf6ee64c0142
	https://git.kernel.org/stable/c/7d99cc0f8e6fa0f35570887899f178122a61d44e
	https://git.kernel.org/stable/c/20a2aa01f5aeb6daad9aeaa7c33dd512c58d81eb