CVE-2026-98346: wifi: cfg80211: don't get the radio mask for netdev-less wdevs

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: don't get the radio mask for netdev-less wdevs cfg80211_calculate_bi_data() calls rdev_get_radio_mask() with wdev->netdev, which can be NULL and then crashes in mac80211. To avoid that, invert the order of checks since wdev->netdev is always valid for beaconing interfaces.

Affected products

Linux kernel: 6.11 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/5b313159c970e945ee125ca87fad0d96ed913e55
https://git.kernel.org/stable/c/693d777846d525b8b218bad97a1befa5d9bd4334
https://git.kernel.org/stable/c/7166da84a7fe3553f9065782fd80299a37b150e5
https://git.kernel.org/stable/c/a7783e585360ee05dfe21d3173dbbe985c94f29e

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