linux-cve-announce - CVE-2023-54273: xfrm: Fix leak of dev tracker

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Message-ID: <2025123001-CVE-2023-54273-29ea@gregkh>
Date: Tue, 30 Dec 2025 13:20:39 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54273: xfrm: Fix leak of dev tracker

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

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

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

xfrm: Fix leak of dev tracker

At the stage of direction checks, the netdev reference tracker is
already initialized, but released with wrong *_put() call.

The Linux kernel CVE team has assigned CVE-2023-54273 to this issue.


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

	Issue introduced in 6.2 with commit 919e43fad5163a8ceb39826ecdee897a9f799351 and fixed in 6.3.4 with commit 7d16c515059b3746f2d6a24a74c3ba786a68c2a1
	Issue introduced in 6.2 with commit 919e43fad5163a8ceb39826ecdee897a9f799351 and fixed in 6.4 with commit ec8f32ad9a65a8cbb465b69e154aaec9d2fe45c4

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-2023-54273
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:
	net/xfrm/xfrm_device.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/7d16c515059b3746f2d6a24a74c3ba786a68c2a1
	https://git.kernel.org/stable/c/ec8f32ad9a65a8cbb465b69e154aaec9d2fe45c4