linux-cve-announce - CVE-2025-39918: wifi: mt76: fix linked list corruption

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Message-ID: <2025100119-CVE-2025-39918-7902@gregkh>
Date: Wed,  1 Oct 2025 09:55:20 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-39918: wifi: mt76: fix linked list corruption

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

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

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

wifi: mt76: fix linked list corruption

Never leave scheduled wcid entries on the temporary on-stack list

The Linux kernel CVE team has assigned CVE-2025-39918 to this issue.


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

	Issue introduced in 6.12 with commit 0b3be9d1d34e21dada69c539fbf51a5fe868028a and fixed in 6.12.46 with commit e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835
	Issue introduced in 6.12 with commit 0b3be9d1d34e21dada69c539fbf51a5fe868028a and fixed in 6.16.6 with commit c91a59b04f928cb4a1436b0e0a27650883d0388a
	Issue introduced in 6.12 with commit 0b3be9d1d34e21dada69c539fbf51a5fe868028a and fixed in 6.17 with commit 49fba87205bec14a0f6bd997635bf3968408161e

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-2025-39918
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/wireless/mediatek/mt76/tx.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/e4d5a5fc61fdc65220a1ce078d24c1d20bbb0835
	https://git.kernel.org/stable/c/c91a59b04f928cb4a1436b0e0a27650883d0388a
	https://git.kernel.org/stable/c/49fba87205bec14a0f6bd997635bf3968408161e