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CVE-2026-98822

Linux: wifi: mac80211: prevent AP VLAN tx from other interfaces

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2fe08c8ff26841430a3c98ab755337325b5d47b5Also 88e96d902efeefbffc34450969f40dc61a0c8a42, 7f93ca31f7fd9b42e7d692f59514436d448ac908CVE List
Published18 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 2fe08c8ff26841430a3c98ab755337325b5d47b5LinuxCVE List
  • 88e96d902efeefbffc34450969f40dc61a0c8a42LinuxCVE List
  • 7f93ca31f7fd9b42e7d692f59514436d448ac908LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 12

  • Linuxaffected: 97ffe75791b3e9c0797d5891070e41321c3beccb before 2fe08c8ff26841430a3c98ab755337325b5d47b5CVE List
  • Linuxaffected: 97ffe75791b3e9c0797d5891070e41321c3beccb before fd875e24e8f2b202e3636b3ef8e6060874eca0e5CVE List
  • Linuxaffected: 97ffe75791b3e9c0797d5891070e41321c3beccb before 88e96d902efeefbffc34450969f40dc61a0c8a42CVE List
  • Linuxaffected: 97ffe75791b3e9c0797d5891070e41321c3beccb before ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0CVE List
  • Linuxaffected: 97ffe75791b3e9c0797d5891070e41321c3beccb before 7f93ca31f7fd9b42e7d692f59514436d448ac908CVE List
  • Linuxaffected: 4.1CVE List
  • Linuxunaffected: all versions before 4.1CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.113 through 6.12.*CVE List
  • Linuxunaffected: 6.18.56 through 6.18.*CVE List
  • Linuxunaffected: 7.2.10 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5