linux-cve-announce - CVE-2023-53661: bnxt: avoid overflow in bnxt_get_nvram

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Message-ID: <2025100702-CVE-2023-53661-6142@gregkh>
Date: Tue,  7 Oct 2025 17:21:20 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53661: bnxt: avoid overflow in bnxt_get_nvram_directory()

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

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

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

bnxt: avoid overflow in bnxt_get_nvram_directory()

The value of an arithmetic expression is subject
of possible overflow due to a failure to cast operands to a larger data
type before performing arithmetic. Used macro for multiplication instead
operator for avoiding overflow.

Found by Security Code and Linux Verification
Center (linuxtesting.org) with SVACE.

The Linux kernel CVE team has assigned CVE-2023-53661 to this issue.


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

	Fixed in 5.15.113 with commit d5eaf2a6b077f32a477feb1e9e1c1f60605b460e
	Fixed in 6.1.30 with commit efb1a257513438d43f4335f09b2f684e8167cad2
	Fixed in 6.3.4 with commit 17e0453a7523ad7a25bb47af941b150a6c66d7b6
	Fixed in 6.4 with commit 7c6dddc239abe660598c49ec95ea0ed6399a4b2a

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-2023-53661
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/broadcom/bnxt/bnxt_ethtool.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/d5eaf2a6b077f32a477feb1e9e1c1f60605b460e
	https://git.kernel.org/stable/c/efb1a257513438d43f4335f09b2f684e8167cad2
	https://git.kernel.org/stable/c/17e0453a7523ad7a25bb47af941b150a6c66d7b6
	https://git.kernel.org/stable/c/7c6dddc239abe660598c49ec95ea0ed6399a4b2a