linux-cve-announce - CVE-2022-50284: ipc: fix memory leak in init_mqueue

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Message-ID: <2025091507-CVE-2022-50284-b5c2@gregkh>
Date: Mon, 15 Sep 2025 16:21:26 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50284: ipc: fix memory leak in init_mqueue_fs()

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

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

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

ipc: fix memory leak in init_mqueue_fs()

When setup_mq_sysctls() failed in init_mqueue_fs(), mqueue_inode_cachep is
not released.  In order to fix this issue, the release path is reordered.

The Linux kernel CVE team has assigned CVE-2022-50284 to this issue.


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

	Issue introduced in 5.19 with commit dc55e35f9e810f23dd69cfdc91a3d636023f57a2 and fixed in 6.0.16 with commit 86273624a68d07f129dc182b8394f487ed4de484
	Issue introduced in 5.19 with commit dc55e35f9e810f23dd69cfdc91a3d636023f57a2 and fixed in 6.1.2 with commit 28dad915abe46d38c5799a0c8130e9a2a1540385
	Issue introduced in 5.19 with commit dc55e35f9e810f23dd69cfdc91a3d636023f57a2 and fixed in 6.2 with commit 12b677f2c697d61e5ddbcb6c1650050a39392f54

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-2022-50284
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:
	ipc/mqueue.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/86273624a68d07f129dc182b8394f487ed4de484
	https://git.kernel.org/stable/c/28dad915abe46d38c5799a0c8130e9a2a1540385
	https://git.kernel.org/stable/c/12b677f2c697d61e5ddbcb6c1650050a39392f54