{"id":"CVE-2026-98340","title":"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…","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 4cd6a518ce7527284bbc9baab5fa2453a7d477c2","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 74ed0d992f392c75e1969415527e06df3f7a4034","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 3658093df69849daf4f813a8f087f358e13be203","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 73365b81630b57e1a1f9d50dc87281797855c2ac","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 7405dd19bda4537a2843637d8d7bed1efd4776cf","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 86235be788094131912e9bd8412b358d91d99f49","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 332ea1502c46f53375cb109fa82bfaff818f3a41","Linux >= 4593c4cbe1c96b3995727dc42f6aa103f4ff5afc < 068843ed0902c552a13860c5ec6b2ca65b57a065","Linux 3.9"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:26.720","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98340","references":[{"url":"https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.399Z","slug":"CVE-2026-98340","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}