linux-cve-announce - CVE-2023-53346: kernel/fail_function: fix memory leak with using debugfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025091719-CVE-2023-53346-2268@gregkh>
Date: Wed, 17 Sep 2025 16:56:45 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53346: kernel/fail_function: fix memory leak with using debugfs_lookup()

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

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

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

kernel/fail_function: fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.

The Linux kernel CVE team has assigned CVE-2023-53346 to this issue.


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

	Fixed in 5.4.235 with commit f6d3aee1c66358471275df9dddd480010f061b0e
	Fixed in 5.10.173 with commit dd9981a11d74ff2eb253bb5c459876f8bd3c6c36
	Fixed in 5.15.100 with commit bb99db06b8b6ce9351633fc61bec9919d8f6f52b
	Fixed in 6.1.18 with commit 29d53c4c5a6f6d2b93aaac95b65cb4c907faf2ff
	Fixed in 6.2.5 with commit 94f68f3e059c478e240f65fcb64746fe371295df
	Fixed in 6.3 with commit 2bb3669f576559db273efe49e0e69f82450efbca

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-2023-53346
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:
	kernel/fail_function.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/f6d3aee1c66358471275df9dddd480010f061b0e
	https://git.kernel.org/stable/c/dd9981a11d74ff2eb253bb5c459876f8bd3c6c36
	https://git.kernel.org/stable/c/bb99db06b8b6ce9351633fc61bec9919d8f6f52b
	https://git.kernel.org/stable/c/29d53c4c5a6f6d2b93aaac95b65cb4c907faf2ff
	https://git.kernel.org/stable/c/94f68f3e059c478e240f65fcb64746fe371295df
	https://git.kernel.org/stable/c/2bb3669f576559db273efe49e0e69f82450efbca