linux-cve-announce - CVE-2024-54456: NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc

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Message-ID: <2025022602-CVE-2024-54456-e8a9@gregkh>
Date: Wed, 26 Feb 2025 18:17:05 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-54456: NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client()

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

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

NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client()

name is char[64] where the size of clnt->cl_program->name remains
unknown. Invoking strcat() directly will also lead to potential buffer
overflow. Change them to strscpy() and strncat() to fix potential
issues.

The Linux kernel CVE team has assigned CVE-2024-54456 to this issue.


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

	Fixed in 6.6.79 with commit 19b3ca651b4b473878c73539febe477905041442
	Fixed in 6.12.16 with commit dd8830779b77f4d1206d28d02ad56a03fc0e78f7
	Fixed in 6.13.4 with commit e8e0eb5601d4a6c74c336e3710afe3a0348c469d
	Fixed in 6.14-rc1 with commit 49fd4e34751e90e6df009b70cd0659dc839e7ca8

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-2024-54456
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/nfs/sysfs.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/19b3ca651b4b473878c73539febe477905041442
	https://git.kernel.org/stable/c/dd8830779b77f4d1206d28d02ad56a03fc0e78f7
	https://git.kernel.org/stable/c/e8e0eb5601d4a6c74c336e3710afe3a0348c469d
	https://git.kernel.org/stable/c/49fd4e34751e90e6df009b70cd0659dc839e7ca8