linux-cve-announce - CVE-2025-38082: gpio: virtuser: fix potential out-of-bound write

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: <2025061845-CVE-2025-38082-7ec8@gregkh>
Date: Wed, 18 Jun 2025 11:35:46 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38082: gpio: virtuser: fix potential out-of-bound write

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

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

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

gpio: virtuser: fix potential out-of-bound write

If the caller wrote more characters, count is truncated to the max
available space in "simple_write_to_buffer". Check that the input
size does not exceed the buffer size. Write a zero termination
afterwards.

The Linux kernel CVE team has assigned CVE-2025-38082 to this issue.


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

	Fixed in 6.12.32 with commit afe090366f470f77e140ff3407db813f57852c04
	Fixed in 6.14.10 with commit b96feaaa0fda1e3871b438143c3446954b32d3a7
	Fixed in 6.15 with commit 7118be7c6072f40391923543fdd1563b8d56377c

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-2025-38082
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:
	drivers/gpio/gpio-virtuser.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/afe090366f470f77e140ff3407db813f57852c04
	https://git.kernel.org/stable/c/b96feaaa0fda1e3871b438143c3446954b32d3a7
	https://git.kernel.org/stable/c/7118be7c6072f40391923543fdd1563b8d56377c