Linux Kernel - ethoc Probe Crash: Null Deref with NET_SHAPER Enabled
CVE-2026-99195 Published on October 28, 2026
net: ethoc: move setting of netops to fix crash
In the Linux kernel, the following vulnerability has been resolved:
net: ethoc: move setting of netops to fix crash
ethoc_probe() calls ethoc_mdio_probe(), which connects the PHY,
before netdev->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").
Products Associated with CVE-2026-99195
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Affected Versions
Linux:- Version ded86da4bbb78cad74cecc368fee3ae3a296e2ca and below c51b13299b4d45226efb09e532fb33e7109f78d7 is affected.
- Version ded86da4bbb78cad74cecc368fee3ae3a296e2ca and below c9f8ce62a5faa73515ff5457716bd7306d20fd93 is affected.
- Version 7.2 is affected.
- Before 7.2 is unaffected.
- Version 7.2.13, <= 7.2.* is unaffected.
- Version 7.3, <= * is unaffected.