linux-cve-announce - CVE-2025-38533: net: libwx: fix the using of Rx buffer DMA

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: <2025081656-CVE-2025-38533-6002@gregkh>
Date: Sat, 16 Aug 2025 13:14:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38533: net: libwx: fix the using of Rx buffer DMA

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

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

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

net: libwx: fix the using of Rx buffer DMA

The wx_rx_buffer structure contained two DMA address fields: 'dma' and
'page_dma'. However, only 'page_dma' was actually initialized and used
to program the Rx descriptor. But 'dma' was uninitialized and used in
some paths.

This could lead to undefined behavior, including DMA errors or
use-after-free, if the uninitialized 'dma' was used. Althrough such
error has not yet occurred, it is worth fixing in the code.

The Linux kernel CVE team has assigned CVE-2025-38533 to this issue.


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

	Issue introduced in 6.3 with commit 3c47e8ae113a68da47987750d9896e325d0aeedd and fixed in 6.6.100 with commit 027701180a7bcb64c42eab291133ef0c87b5b6c5
	Issue introduced in 6.3 with commit 3c47e8ae113a68da47987750d9896e325d0aeedd and fixed in 6.12.40 with commit ba7c793f96c1c2b944bb6f423d7243f3afc30fe9
	Issue introduced in 6.3 with commit 3c47e8ae113a68da47987750d9896e325d0aeedd and fixed in 6.15.8 with commit 05c37b574997892a40a0e9b9b88a481566b2367d
	Issue introduced in 6.3 with commit 3c47e8ae113a68da47987750d9896e325d0aeedd and fixed in 6.16 with commit 5fd77cc6bd9b368431a815a780e407b7781bcca0

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-2025-38533
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/net/ethernet/wangxun/libwx/wx_lib.c
	drivers/net/ethernet/wangxun/libwx/wx_type.h


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/027701180a7bcb64c42eab291133ef0c87b5b6c5
	https://git.kernel.org/stable/c/ba7c793f96c1c2b944bb6f423d7243f3afc30fe9
	https://git.kernel.org/stable/c/05c37b574997892a40a0e9b9b88a481566b2367d
	https://git.kernel.org/stable/c/5fd77cc6bd9b368431a815a780e407b7781bcca0