Linux Kernel: mac80211 AP VLAN TX Restricted across Interfaces
CVE-2026-98822 Published on October 18, 2026
wifi: mac80211: prevent AP VLAN tx from other interfaces
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: prevent AP VLAN tx from other interfaces
Since the station lookup was factored out of ieee80211_build_hdr(),
ieee80211_lookup_ra_sta() uses sta_info_get_bss() for all AP and AP VLAN
frames, not only for control port frames. A unicast frame sent on one
interface thus matches a station of a different VLAN of the same BSS and
is transmitted to it.
Only match stations of the interface the frame is sent on, except for
control port frames, since those may be sent for VLAN stations directly
on the BSS interface.
Products Associated with CVE-2026-98822
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Affected Versions
Linux:- Version 97ffe75791b3e9c0797d5891070e41321c3beccb and below fd875e24e8f2b202e3636b3ef8e6060874eca0e5 is affected.
- Version 97ffe75791b3e9c0797d5891070e41321c3beccb and below 88e96d902efeefbffc34450969f40dc61a0c8a42 is affected.
- Version 97ffe75791b3e9c0797d5891070e41321c3beccb and below ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0 is affected.
- Version 97ffe75791b3e9c0797d5891070e41321c3beccb and below 7f93ca31f7fd9b42e7d692f59514436d448ac908 is affected.
- Version 4.1 is affected.
- Before 4.1 is unaffected.
- Version 6.12.113, <= 6.12.* is unaffected.
- Version 6.18.56, <= 6.18.* is unaffected.
- Version 7.2.10, <= 7.2.* is unaffected.
- Version 7.3-rc6, <= * is unaffected.