linux-cve-announce - CVE-2025-37872: net: txgbe: fix memory leak in txgbe

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Message-ID: <2025050959-CVE-2025-37872-6e2f@gregkh>
Date: Fri,  9 May 2025 08:44:06 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37872: net: txgbe: fix memory leak in txgbe_probe() error path

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

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

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

net: txgbe: fix memory leak in txgbe_probe() error path

When txgbe_sw_init() is called, memory is allocated for wx->rss_key
in wx_init_rss_key(). However, in txgbe_probe() function, the subsequent
error paths after txgbe_sw_init() don't free the rss_key. Fix that by
freeing it in error path along with wx->mac_table.

Also change the label to which execution jumps when txgbe_sw_init()
fails, because otherwise, it could lead to a double free for rss_key,
when the mac_table allocation fails in wx_sw_init().

The Linux kernel CVE team has assigned CVE-2025-37872 to this issue.


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

	Issue introduced in 6.8 with commit 937d46ecc5f941b26270bdf7ce37495f12b25955 and fixed in 6.12.25 with commit 635863d93deb8e352d63a8eba852efeaf1ac3539
	Issue introduced in 6.8 with commit 937d46ecc5f941b26270bdf7ce37495f12b25955 and fixed in 6.14.4 with commit 837197a722919f5b0eeb967fe7cb0cc1e83173b9
	Issue introduced in 6.8 with commit 937d46ecc5f941b26270bdf7ce37495f12b25955 and fixed in 6.15-rc3 with commit b2727326d0a53709380aa147018085d71a6d4843

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-2025-37872
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/wangxun/txgbe/txgbe_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/635863d93deb8e352d63a8eba852efeaf1ac3539
	https://git.kernel.org/stable/c/837197a722919f5b0eeb967fe7cb0cc1e83173b9
	https://git.kernel.org/stable/c/b2727326d0a53709380aa147018085d71a6d4843