linux-cve-announce - CVE-2025-39897: net: xilinx: axienet: Add error handling for RX metadata pointer retrieval

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: <2025100116-CVE-2025-39897-a100@gregkh>
Date: Wed,  1 Oct 2025 09:43:21 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-39897: net: xilinx: axienet: Add error handling for RX metadata pointer retrieval

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

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

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

net: xilinx: axienet: Add error handling for RX metadata pointer retrieval

Add proper error checking for dmaengine_desc_get_metadata_ptr() which
can return an error pointer and lead to potential crashes or undefined
behaviour if the pointer retrieval fails.

Properly handle the error by unmapping DMA buffer, freeing the skb and
returning early to prevent further processing with invalid data.

The Linux kernel CVE team has assigned CVE-2025-39897 to this issue.


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

	Issue introduced in 6.8 with commit 6a91b846af85a24241decd686269e8e038eb13d1 and fixed in 6.12.46 with commit d0ecda6fdd840b406df6617b003b036f65dd8926
	Issue introduced in 6.8 with commit 6a91b846af85a24241decd686269e8e038eb13d1 and fixed in 6.16.6 with commit 92e2fc92bc4eb2bc0e84404316fbc02ddd0a3196
	Issue introduced in 6.8 with commit 6a91b846af85a24241decd686269e8e038eb13d1 and fixed in 6.17 with commit 8bbceba7dc5090c00105e006ce28d1292cfda8dd

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-2025-39897
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/xilinx/xilinx_axienet_main.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/d0ecda6fdd840b406df6617b003b036f65dd8926
	https://git.kernel.org/stable/c/92e2fc92bc4eb2bc0e84404316fbc02ddd0a3196
	https://git.kernel.org/stable/c/8bbceba7dc5090c00105e006ce28d1292cfda8dd