linux-cve-announce - CVE-2025-40161: mailbox: zynqmp-ipi: Fix SGI cleanup on unbind

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Message-ID: <2025111239-CVE-2025-40161-8d13@gregkh>
Date: Wed, 12 Nov 2025 19:24:42 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-40161: mailbox: zynqmp-ipi: Fix SGI cleanup on unbind

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

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

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

mailbox: zynqmp-ipi: Fix SGI cleanup on unbind

The driver incorrectly determines SGI vs SPI interrupts by checking IRQ
number < 16, which fails with dynamic IRQ allocation. During unbind,
this causes improper SGI cleanup leading to kernel crash.

Add explicit irq_type field to pdata for reliable identification of SGI
interrupts (type-2) and only clean up SGI resources when appropriate.

The Linux kernel CVE team has assigned CVE-2025-40161 to this issue.


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

	Issue introduced in 6.10 with commit 6ffb1635341bec50fa9540ae7827d1e5d75ae0b0 and fixed in 6.12.54 with commit 1ee147efee68be00203b1fee6479911debb1edb2
	Issue introduced in 6.10 with commit 6ffb1635341bec50fa9540ae7827d1e5d75ae0b0 and fixed in 6.17.4 with commit 32bf7c6e01f5ba17a53ba236a770bd0274cefdf4
	Issue introduced in 6.10 with commit 6ffb1635341bec50fa9540ae7827d1e5d75ae0b0 and fixed in 6.18-rc1 with commit bb160e791ab15b89188a7a19589b8e11f681bef3

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-2025-40161
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/mailbox/zynqmp-ipi-mailbox.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/1ee147efee68be00203b1fee6479911debb1edb2
	https://git.kernel.org/stable/c/32bf7c6e01f5ba17a53ba236a770bd0274cefdf4
	https://git.kernel.org/stable/c/bb160e791ab15b89188a7a19589b8e11f681bef3