{"id":"CVE-2026-98340","published":"2026-10-06T09:18:26.720","lastModified":"2026-10-06T09:18:26.720","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: only group hidden BSSes with beacon entries\n\nWhen a probe response for an unknown BSS comes in, __cfg80211_bss_update()\nlooks for an existing entry with the same BSSID and a hidden (zero-length\nor NUL-filled) SSID, and if it finds one it groups them, using the beacon\nIEs from the existing entry.\n\nBut that could find another entry without a beacon, if it was also from a\nprobe response (with SSID), so there's a group without beacon elements.\n\nIf a beacon with a hidden SSID for that BSSID arrives later,\ncfg80211_combine_bsses() goes looking for the probe response entries that\nbelong to it - i.e. entries with the same BSSID and channel that have no\nbeacon IEs - and finds those two. They are already grouped with each\nother, so it hits its\n\n  WARN_ON_ONCE(bss->pub.hidden_beacon_bss)\n  WARN_ON_ONCE(!list_empty(&bss->hidden_list))\n\nwhich are there because an entry without beacon elements is not supposed\nto be part of a group yet.\n\nOnly combine entries when a beacon was already received, ones that are\nkept separate will be combined when a beacon arrives.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065","tags":[]},{"url":"https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41","tags":[]},{"url":"https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203","tags":[]},{"url":"https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2","tags":[]},{"url":"https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac","tags":[]},{"url":"https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf","tags":[]},{"url":"https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034","tags":[]},{"url":"https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}