{"cve":"CVE-2026-98340","nvd":{"published":"2026-10-06T09:18:26.720","modified":"2026-10-19T10:18:36.320","status":"Received","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065","https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41","https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203","https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2","https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-98340","score":0.00177,"percentile":0.07156,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}