linux-cve-announce - CVE-2025-37860: sfc: fix NULL dereferences in ef100_process_design

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Message-ID: <2025041816-CVE-2025-37860-9af2@gregkh>
Date: Fri, 18 Apr 2025 09:02:15 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37860: sfc: fix NULL dereferences in ef100_process_design_param()

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

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

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

sfc: fix NULL dereferences in ef100_process_design_param()

Since cited commit, ef100_probe_main() and hence also
 ef100_check_design_params() run before efx->net_dev is created;
 consequently, we cannot netif_set_tso_max_size() or _segs() at this
 point.
Move those netif calls to ef100_probe_netdev(), and also replace
 netif_err within the design params code with pci_err.

The Linux kernel CVE team has assigned CVE-2025-37860 to this issue.


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

	Issue introduced in 6.0 with commit 98ff4c7c8ac7f5339aac6114105395fea19f992e and fixed in 6.14.2 with commit e56391011381d6d029da377a65ac314cb3d5def2
	Issue introduced in 6.0 with commit 98ff4c7c8ac7f5339aac6114105395fea19f992e and fixed in 6.15-rc1 with commit 8241ecec1cdc6699ae197d52d58e76bddd995fa5

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-2025-37860
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/sfc/ef100_netdev.c
	drivers/net/ethernet/sfc/ef100_nic.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/e56391011381d6d029da377a65ac314cb3d5def2
	https://git.kernel.org/stable/c/8241ecec1cdc6699ae197d52d58e76bddd995fa5