CVE-2026-99196: net: au1000: move setting of netops to fix crash

CVE-2026-99196: net: au1000: move setting of netops to fix crash

[Greg Kroah-Hartman]

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

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

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

net: au1000: move setting of netops to fix crash

au1000_probe() calls au1000_mii_probe(), which connects the PHY,
before dev->netdev_ops is assigned. phy_attach_direct() ->
phy_link_topo_add_phy() reads dev->netdev_ops through
netdev_need_ops_lock() since the commit in question, so probing crashes
with a NULL pointer dereference when CONFIG_NET_SHAPER is enabled.

Assign netdev_ops before the PHY attach, as was done for emac in commit
7c9f391ec89c ("net: emac: move setting of netops to fix crash").

The Linux kernel CVE team has assigned CVE-2026-99196 to this issue.


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

	Issue introduced in 7.2 with commit ded86da4bbb78cad74cecc368fee3ae3a296e2ca and fixed in 7.2.13 with commit cfc11024fc061bf36044b40de9ecab57ed0a537d
	Issue introduced in 7.2 with commit ded86da4bbb78cad74cecc368fee3ae3a296e2ca and fixed in 7.3 with commit beabbafdd0f6779813a7656baa1b412b19bda911

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-2026-99196
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/amd/au1000_eth.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/cfc11024fc061bf36044b40de9ecab57ed0a537d
	https://git.kernel.org/stable/c/beabbafdd0f6779813a7656baa1b412b19bda911