linux-cve-announce - CVE-2025-38251: atm: clip: prevent NULL deref in clip

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: <2025070934-CVE-2025-38251-3894@gregkh>
Date: Wed,  9 Jul 2025 12:42:43 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38251: atm: clip: prevent NULL deref in clip_push()

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

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

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

atm: clip: prevent NULL deref in clip_push()

Blamed commit missed that vcc_destroy_socket() calls
clip_push() with a NULL skb.

If clip_devs is NULL, clip_push() then crashes when reading
skb->truesize.

The Linux kernel CVE team has assigned CVE-2025-38251 to this issue.


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

	Issue introduced in 5.7 with commit 93a2014afbace907178afc3c9c1e62c9a338595a and fixed in 6.1.143 with commit 88c88f91f4b3563956bb52e7a71a3640f7ece157
	Issue introduced in 5.7 with commit 93a2014afbace907178afc3c9c1e62c9a338595a and fixed in 6.6.96 with commit 3c709dce16999bf6a1d2ce377deb5dd6fdd8cb08
	Issue introduced in 5.7 with commit 93a2014afbace907178afc3c9c1e62c9a338595a and fixed in 6.12.36 with commit a07005a77b18ae59b8471e7e4d991fa9f642b3c2
	Issue introduced in 5.7 with commit 93a2014afbace907178afc3c9c1e62c9a338595a and fixed in 6.15.5 with commit ede31ad949ae0d03cb4c5edd79991586ad7c8bb8
	Issue introduced in 5.7 with commit 93a2014afbace907178afc3c9c1e62c9a338595a and fixed in 6.16-rc4 with commit b993ea46b3b601915ceaaf3c802adf11e7d6bac6

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-2025-38251
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:
	net/atm/clip.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/88c88f91f4b3563956bb52e7a71a3640f7ece157
	https://git.kernel.org/stable/c/3c709dce16999bf6a1d2ce377deb5dd6fdd8cb08
	https://git.kernel.org/stable/c/a07005a77b18ae59b8471e7e4d991fa9f642b3c2
	https://git.kernel.org/stable/c/ede31ad949ae0d03cb4c5edd79991586ad7c8bb8
	https://git.kernel.org/stable/c/b993ea46b3b601915ceaaf3c802adf11e7d6bac6