linux-cve-announce - CVE-2025-23155: net: stmmac: Fix accessing freed irq affinity

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Message-ID: <2025050129-CVE-2025-23155-a9c4@gregkh>
Date: Thu,  1 May 2025 14:56:35 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-23155: net: stmmac: Fix accessing freed irq affinity_hint

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

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

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

net: stmmac: Fix accessing freed irq affinity_hint

The cpumask should not be a local variable, since its pointer is saved
to irq_desc and may be accessed from procfs.
To fix it, use the persistent mask cpumask_of(cpu#).

The Linux kernel CVE team has assigned CVE-2025-23155 to this issue.


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

	Issue introduced in 5.13 with commit 8deec94c6040bb4a767f6e9456a0a44c7f2e713e and fixed in 6.13.12 with commit e148266e104fce396ad624079a6812ac3a9982ef
	Issue introduced in 5.13 with commit 8deec94c6040bb4a767f6e9456a0a44c7f2e713e and fixed in 6.14.3 with commit 9e51a6a44e2c4de780a26e8fe110d708e806a8cd
	Issue introduced in 5.13 with commit 8deec94c6040bb4a767f6e9456a0a44c7f2e713e and fixed in 6.15-rc1 with commit c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef

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-2025-23155
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/stmicro/stmmac/stmmac_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/e148266e104fce396ad624079a6812ac3a9982ef
	https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd
	https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef