linux-cve-announce - CVE-2025-22110: netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error

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Message-ID: <2025041624-CVE-2025-22110-6a28@gregkh>
Date: Wed, 16 Apr 2025 16:13:21 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22110: netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error

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

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

netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error

It is possible that ctx in nfqnl_build_packet_message() could be used
before it is properly initialize, which is only initialized
by nfqnl_get_sk_secctx().

This patch corrects this problem by initializing the lsmctx to a safe
value when it is declared.

This is similar to the commit 35fcac7a7c25
("audit: Initialize lsmctx to avoid memory allocation error").

The Linux kernel CVE team has assigned CVE-2025-22110 to this issue.


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

	Issue introduced in 6.14 with commit 2d470c778120d3cdb8d8ab250329ca85f49f12b1 and fixed in 6.14.2 with commit ddbf7e1d82a1d0c1d3425931a6cb1b83f8454759
	Issue introduced in 6.14 with commit 2d470c778120d3cdb8d8ab250329ca85f49f12b1 and fixed in 6.15-rc1 with commit 778b09d91baafb13408470c721d034d6515cfa5a

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-2025-22110
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/netfilter/nfnetlink_queue.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/ddbf7e1d82a1d0c1d3425931a6cb1b83f8454759
	https://git.kernel.org/stable/c/778b09d91baafb13408470c721d034d6515cfa5a