linux-cve-announce - CVE-2022-49854: mctp: Fix an error handling path in mctp

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Message-ID: <2025050145-CVE-2022-49854-2225@gregkh>
Date: Thu,  1 May 2025 16:10:44 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-49854: mctp: Fix an error handling path in mctp_init()

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

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

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

mctp: Fix an error handling path in mctp_init()

If mctp_neigh_init() return error, the routes resources should
be released in the error handling path. Otherwise some resources
leak.

The Linux kernel CVE team has assigned CVE-2022-49854 to this issue.


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

	Issue introduced in 5.15 with commit 4d8b9319282ae84f5a17b28d8b5b5d1e7e537312 and fixed in 5.15.79 with commit 49d8a6e24a3496d86e8d8ae748375df984fb6d6f
	Issue introduced in 5.15 with commit 4d8b9319282ae84f5a17b28d8b5b5d1e7e537312 and fixed in 6.0.9 with commit 216c83222d2eb24b0e63df56e8740b02c33286e8
	Issue introduced in 5.15 with commit 4d8b9319282ae84f5a17b28d8b5b5d1e7e537312 and fixed in 6.1 with commit d4072058af4fd8fb4658e7452289042a406a9398

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-2022-49854
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/mctp/af_mctp.c
	net/mctp/route.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/49d8a6e24a3496d86e8d8ae748375df984fb6d6f
	https://git.kernel.org/stable/c/216c83222d2eb24b0e63df56e8740b02c33286e8
	https://git.kernel.org/stable/c/d4072058af4fd8fb4658e7452289042a406a9398