linux-cve-announce - CVE-2025-38536: net: airoha: fix potential use-after-free in airoha_npu

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Message-ID: <2025081656-CVE-2025-38536-c669@gregkh>
Date: Sat, 16 Aug 2025 13:14:07 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38536: net: airoha: fix potential use-after-free in airoha_npu_get()

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

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

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

net: airoha: fix potential use-after-free in airoha_npu_get()

np->name was being used after calling of_node_put(np), which
releases the node and can lead to a use-after-free bug.
Previously, of_node_put(np) was called unconditionally after
of_find_device_by_node(np), which could result in a use-after-free if
pdev is NULL.

This patch moves of_node_put(np) after the error check to ensure
the node is only released after both the error and success cases
are handled appropriately, preventing potential resource issues.

The Linux kernel CVE team has assigned CVE-2025-38536 to this issue.


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

	Issue introduced in 6.15 with commit 23290c7bc190def4e1ca61610992d9b7c32e33f3 and fixed in 6.15.8 with commit df6bf96b41e547e350667bc4c143be53646d070d
	Issue introduced in 6.15 with commit 23290c7bc190def4e1ca61610992d9b7c32e33f3 and fixed in 6.16 with commit 3cd582e7d0787506990ef0180405eb6224fa90a6

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-2025-38536
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/airoha/airoha_npu.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/df6bf96b41e547e350667bc4c143be53646d070d
	https://git.kernel.org/stable/c/3cd582e7d0787506990ef0180405eb6224fa90a6