CVE-2026-98331 is a vulnerability in Linux Kernel
Published on October 6, 2026
wifi: mac80211: unlist vifs when their netdev is unregistered
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: unlist vifs when their netdev is unregistered
mac80211 only removes vifs from the local->interfaces list when
an interface is removed via ieee80211_if_remove(), before it
unregisters the netdev. However, it's possible for a netdev to
be unregistered without going through that: When the netns that
holds the wiphy is destroyed, the wiphy is supposed to move to
the init_ns, but that can run into allocation failures.
Then, mac80211 has an interface listed that doesn't exist, and
will eventually hit
BUG: failure at net/wireless/core.h:141/wiphy_to_rdev()!
...
_cfg80211_unregister_wdev+0x24/0x36a [cfg80211]
cfg80211_unregister_wdev+0x15/0x1d [cfg80211]
ieee80211_remove_interfaces+0x1ff/0x257 [mac80211]
ieee80211_unregister_hw+0x73/0x1d1 [mac80211]
mac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim]
Remove the interface from the list in ->ndo_uninit if it's still
around to avoid this.
Products Associated with CVE-2026-98331
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Affected Versions
Linux:- Version 463d018323851a608eef52a9427b0585005c647f and below a22c02863439993095acd0c3db97fa53cd515f4f is affected.
- Version 463d018323851a608eef52a9427b0585005c647f and below 20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0 is affected.
- Version 463d018323851a608eef52a9427b0585005c647f and below b735ad1a9aca6080192c1316cf2706e5e1318762 is affected.
- Version 463d018323851a608eef52a9427b0585005c647f and below d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1 is affected.
- Version 463d018323851a608eef52a9427b0585005c647f and below 821bab0456dfca12acef6df702c8f2477d313227 is affected.
- Version 463d018323851a608eef52a9427b0585005c647f and below eee2efd82867b623982ac51925b5a1812a74c50d is affected.
- Version 2.6.32 is affected.
- Before 2.6.32 is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.112, <= 6.12.* is unaffected.
- Version 6.18.54, <= 6.18.* is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.