linux-cve-announce - CVE-2025-21800: net/mlx5: HWS, fix definer's HWS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025022752-CVE-2025-21800-d1e6@gregkh>
Date: Thu, 27 Feb 2025 11:59:54 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21800: net/mlx5: HWS, fix definer's HWS_SET32 macro for negative offset

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

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

net/mlx5: HWS, fix definer's HWS_SET32 macro for negative offset

When bit offset for HWS_SET32 macro is negative,
UBSAN complains about the shift-out-of-bounds:

  UBSAN: shift-out-of-bounds in
  drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c:177:2
  shift exponent -8 is negative

The Linux kernel CVE team has assigned CVE-2025-21800 to this issue.


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

	Issue introduced in 6.12 with commit 74a778b4a63faef9ff02aad0d332b209835f93e1 and fixed in 6.12.13 with commit 92cff996624c4757d5bbace3dfa3f1567ba94143
	Issue introduced in 6.12 with commit 74a778b4a63faef9ff02aad0d332b209835f93e1 and fixed in 6.13.2 with commit 69c676c0ded472713e6d1b3a456b3c4f52f66f0e
	Issue introduced in 6.12 with commit 74a778b4a63faef9ff02aad0d332b209835f93e1 and fixed in 6.14-rc1 with commit be482f1d10da781db9445d2753c1e3f1fd82babf

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-2025-21800
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/mellanox/mlx5/core/steering/hws/definer.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/92cff996624c4757d5bbace3dfa3f1567ba94143
	https://git.kernel.org/stable/c/69c676c0ded472713e6d1b3a456b3c4f52f66f0e
	https://git.kernel.org/stable/c/be482f1d10da781db9445d2753c1e3f1fd82babf