linux-cve-announce - CVE-2025-40010: afs: Fix potential null pointer dereference in afs_put

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: <2025102002-CVE-2025-40010-5f54@gregkh>
Date: Mon, 20 Oct 2025 17:27:06 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-40010: afs: Fix potential null pointer dereference in afs_put_server

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

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

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

afs: Fix potential null pointer dereference in afs_put_server

afs_put_server() accessed server->debug_id before the NULL check, which
could lead to a null pointer dereference. Move the debug_id assignment,
ensuring we never dereference a NULL server pointer.

The Linux kernel CVE team has assigned CVE-2025-40010 to this issue.


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

	Issue introduced in 6.0 with commit 2757a4dc184997c66ef1de32636f73b9f21aac14 and fixed in 6.1.155 with commit 7b8381f3c405b864a814d747e526e078c3ef4bc2
	Issue introduced in 6.0 with commit 2757a4dc184997c66ef1de32636f73b9f21aac14 and fixed in 6.6.109 with commit cab278cead49a547ac84c3e185f446f381303eae
	Issue introduced in 6.0 with commit 2757a4dc184997c66ef1de32636f73b9f21aac14 and fixed in 6.12.50 with commit a13dbc5e20c7284b82afe6f08debdecf51d2ca04
	Issue introduced in 6.0 with commit 2757a4dc184997c66ef1de32636f73b9f21aac14 and fixed in 6.16.10 with commit 41782c44bb8431c43043129ae42f2ba614938479
	Issue introduced in 6.0 with commit 2757a4dc184997c66ef1de32636f73b9f21aac14 and fixed in 6.17 with commit 9158c6bb245113d4966df9b2ba602197a379412e

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-2025-40010
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/afs/server.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/7b8381f3c405b864a814d747e526e078c3ef4bc2
	https://git.kernel.org/stable/c/cab278cead49a547ac84c3e185f446f381303eae
	https://git.kernel.org/stable/c/a13dbc5e20c7284b82afe6f08debdecf51d2ca04
	https://git.kernel.org/stable/c/41782c44bb8431c43043129ae42f2ba614938479
	https://git.kernel.org/stable/c/9158c6bb245113d4966df9b2ba602197a379412e