CVE-2026-98330

/// Technical description

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

wifi: cfg80211: get the wiphy out of a dying network namespace

When a network namespace is destroyed, cfg80211_pernet_exit() moves any

wiphy back to the initial namespace, and just warns if that fails. But

moving an interface can fail (due to allocation failures), and then the

wiphy is left behind with a garbage netns pointer:

Kernel mode fault at addr 0x30

genlmsg_multicast_netns.constprop.0+0x46/0xcf [cfg80211]

nl80211_notify_wiphy+0xcd/0xe8 [cfg80211]

wiphy_unregister+0x169/0x3fc [cfg80211]

Note that commit debac3a20dec ("net: Remove conflicting altnames for

dying netns in __dev_change_net_namespace().") fixed another path

that could reach it without allocation failures.

Remove interfaces that cannot be moved instead of failing the switch,

so that the wiphy always ends up in the initial namespace. In this

case the netdev core will unregister the interfaces anyway.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References