linux-cve-announce - CVE-2023-54128: fs: drop peer group ids under namespace lock

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: <2025122419-CVE-2023-54128-a164@gregkh>
Date: Wed, 24 Dec 2025 14:07:25 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54128: fs: drop peer group ids under namespace lock

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

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

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

fs: drop peer group ids under namespace lock

When cleaning up peer group ids in the failure path we need to make sure
to hold on to the namespace lock. Otherwise another thread might just
turn the mount from a shared into a non-shared mount concurrently.

The Linux kernel CVE team has assigned CVE-2023-54128 to this issue.


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

	Issue introduced in 5.12 with commit 2a1867219c7b27f928e2545782b86daaf9ad50bd and fixed in 5.15.107 with commit 0af8fae81d8b7f1beddc17c5d4cfa43235134648
	Issue introduced in 5.12 with commit 2a1867219c7b27f928e2545782b86daaf9ad50bd and fixed in 6.1.24 with commit ddca03d97daa7b07b60c52e3d3060762732c6666
	Issue introduced in 5.12 with commit 2a1867219c7b27f928e2545782b86daaf9ad50bd and fixed in 6.2.11 with commit 65c324d3f35c05e37afec39ac80743583fdcc96c
	Issue introduced in 5.12 with commit 2a1867219c7b27f928e2545782b86daaf9ad50bd and fixed in 6.3 with commit cb2239c198ad9fbd5aced22cf93e45562da781eb

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-2023-54128
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:
	fs/namespace.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/0af8fae81d8b7f1beddc17c5d4cfa43235134648
	https://git.kernel.org/stable/c/ddca03d97daa7b07b60c52e3d3060762732c6666
	https://git.kernel.org/stable/c/65c324d3f35c05e37afec39ac80743583fdcc96c
	https://git.kernel.org/stable/c/cb2239c198ad9fbd5aced22cf93e45562da781eb