CVE-2026-68407: wifi: nl80211: free RNR data on MBSSID mismatch

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: 2026-08-10 · updated 2026-08-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: free RNR data on MBSSID mismatch nl80211_parse_beacon() rejects EMA RNR data when there are fewer RNR entries than MBSSID entries. The rejected RNR allocation has not been attached to the beacon data yet, so free it before returning the error.

Affected products

Linux kernel: from 6.1.160 before 6.1.183; 6.4 — fixed in 6.1.183, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.1.183, 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/07a95ec2b54774201fdf4ef7ffb0ca2ab19ed29c
https://git.kernel.org/stable/c/312c8b9d7836ef58e552619a8c19be08b04032bb
https://git.kernel.org/stable/c/4b76fc30c80b240107a7de3c7560113c9290eafc
https://git.kernel.org/stable/c/6f919f29e9b75793104709987131b8d910d7800a
https://git.kernel.org/stable/c/fa9592ef7de11f8c7042315d9bc20e91a97f679e
https://git.kernel.org/stable/c/fb052a6e2fa866384d8edc237746583ec94c15af

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