linux-cve-announce - CVE-2021-47654: samples/landlock: Fix path

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Message-ID: <2025022649-CVE-2021-47654-671d@gregkh>
Date: Wed, 26 Feb 2025 02:54:05 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2021-47654: samples/landlock: Fix path_list memory leak

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

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

samples/landlock: Fix path_list memory leak

Clang static analysis reports this error

sandboxer.c:134:8: warning: Potential leak of memory
  pointed to by 'path_list'
        ret = 0;
              ^
path_list is allocated in parse_path() but never freed.

The Linux kernel CVE team has assigned CVE-2021-47654 to this issue.


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

	Fixed in 5.15.33 with commit 20fbf100f84b9aeb9c91421abe1927bc152bc32b
	Fixed in 5.16.19 with commit 49b0d8bf05809df5f87e5c03e26d74bdfdab4571
	Fixed in 5.17.2 with commit 017196730299ccd6eed24bbfabed8af4ffd81530
	Fixed in 5.18 with commit 66b513b7c64a7290c1fbb88e657f7cece992e131

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-2021-47654
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:
	samples/landlock/sandboxer.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/20fbf100f84b9aeb9c91421abe1927bc152bc32b
	https://git.kernel.org/stable/c/49b0d8bf05809df5f87e5c03e26d74bdfdab4571
	https://git.kernel.org/stable/c/017196730299ccd6eed24bbfabed8af4ffd81530
	https://git.kernel.org/stable/c/66b513b7c64a7290c1fbb88e657f7cece992e131