CVE-2024-35789: wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-17 · updated 2026-10-15
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes When moving a station out of a VLAN and deleting the VLAN afterwards, the fast_rx entry still holds a pointer to the VLAN's netdev, which can cause use-after-free bugs. Fix this by immediately calling ieee80211_check_fast_rx after the VLAN change.

Affected products

Debian Linux: 10.0
Linux kernel: from 4.14.232 before 4.15; from 4.19.189 before 4.19.312; from 5.4.114 before 5.4.274; from 5.10.32 before 5.10.215; from 5.11.16 before 5.12; from 5.12.1 before 5.15.154 — fixed in 4.15, 4.19.312, 5.10.215, 5.12, 5.15.154, 5.4.274

How to fix

Upgrade to a fixed version: Linux kernel 4.15, 4.19.312, 5.10.215, 5.12. Check the vendor advisory for mitigations.

References

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