Vulnerability in Linux

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund18 Oct 2026WID-SEC-2026-4019

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-98866CVE-2026-98624CVE-2026-98745+326 more CVEs

[ References ]References

• git.kernel.org/stable/c/2fe08c8ff26841430a3c98ab755337325b5d47b5
• git.kernel.org/stable/c/7f93ca31f7fd9b42e7d692f59514436d448ac908
• git.kernel.org/stable/c/88e96d902efeefbffc34450969f40dc61a0c8a42
• git.kernel.org/stable/c/ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0
• git.kernel.org/stable/c/fd875e24e8f2b202e3636b3ef8e6060874eca0e5