linux-cve-announce - CVE-2026-23084: be2net: Fix NULL pointer dereference in be_cmd_get_mac_from

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Message-ID: <2026020422-CVE-2026-23084-8073@gregkh>
Date: Wed,  4 Feb 2026 17:14:43 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23084: be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list

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

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

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

be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list

When the parameter pmac_id_valid argument of be_cmd_get_mac_from_list() is
set to false, the driver may request the PMAC_ID from the firmware of the
network card, and this function will store that PMAC_ID at the provided
address pmac_id. This is the contract of this function.

However, there is a location within the driver where both
pmac_id_valid == false and pmac_id == NULL are being passed. This could
result in dereferencing a NULL pointer.

To resolve this issue, it is necessary to pass the address of a stub
variable to the function.

The Linux kernel CVE team has assigned CVE-2026-23084 to this issue.


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

	Issue introduced in 3.12 with commit 95046b927a54f461766f83a212c6a93bc5fd2e67 and fixed in 6.6.122 with commit e206fb415db36bad52bb90c08d46ce71ffbe8a80
	Issue introduced in 3.12 with commit 95046b927a54f461766f83a212c6a93bc5fd2e67 and fixed in 6.12.68 with commit 47ffb4dcffe336f4a7bd0f3284be7aadc6484698
	Issue introduced in 3.12 with commit 95046b927a54f461766f83a212c6a93bc5fd2e67 and fixed in 6.18.8 with commit 31410a01a86bcb98c798d01061abf1f789c4f75a
	Issue introduced in 3.12 with commit 95046b927a54f461766f83a212c6a93bc5fd2e67 and fixed in 6.19-rc7 with commit 8215794403d264739cc676668087512950b2ff31

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-2026-23084
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/emulex/benet/be_cmds.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/e206fb415db36bad52bb90c08d46ce71ffbe8a80
	https://git.kernel.org/stable/c/47ffb4dcffe336f4a7bd0f3284be7aadc6484698
	https://git.kernel.org/stable/c/31410a01a86bcb98c798d01061abf1f789c4f75a
	https://git.kernel.org/stable/c/8215794403d264739cc676668087512950b2ff31