linux-cve-announce - CVE-2025-37873: eth: bnxt: fix missing ring index trim on error path

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Message-ID: <2025050900-CVE-2025-37873-c3aa@gregkh>
Date: Fri,  9 May 2025 08:44:07 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37873: eth: bnxt: fix missing ring index trim on error path

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

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

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

eth: bnxt: fix missing ring index trim on error path

Commit under Fixes converted tx_prod to be free running but missed
masking it on the Tx error path. This crashes on error conditions,
for example when DMA mapping fails.

The Linux kernel CVE team has assigned CVE-2025-37873 to this issue.


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

	Issue introduced in 6.8 with commit 6d1add95536bafe585c500ad8114af7ed4225a0f and fixed in 6.12.25 with commit 21e70f694bc0dcb40174b0940cc52a7769fc19e0
	Issue introduced in 6.8 with commit 6d1add95536bafe585c500ad8114af7ed4225a0f and fixed in 6.14.4 with commit 3742c55de00266fa7c8fd2c5d61a453d223a9cd1
	Issue introduced in 6.8 with commit 6d1add95536bafe585c500ad8114af7ed4225a0f and fixed in 6.15-rc3 with commit 12f2d033fae957d84c2c0ce604d2a077e61fa2c0

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-2025-37873
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.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/21e70f694bc0dcb40174b0940cc52a7769fc19e0
	https://git.kernel.org/stable/c/3742c55de00266fa7c8fd2c5d61a453d223a9cd1
	https://git.kernel.org/stable/c/12f2d033fae957d84c2c0ce604d2a077e61fa2c0