{
  "id": "CVE-2026-98340",
  "url": "https://spydr.io/cve/CVE-2026-98340",
  "published": "2026-10-06T09:18:26.720Z",
  "modified": "2026-10-06T09:18:26.720Z",
  "score": null,
  "severity": null,
  "cvss_version": null,
  "vector": null,
  "score_source": null,
  "epss": 0.00184,
  "epss_percentile": 0.07298,
  "exploited": false,
  "kev": null,
  "ssvc_exploitation": null,
  "vendors": [
    "Linux"
  ],
  "products": [
    "Linux"
  ],
  "cwes": [],
  "description": "In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: only group hidden BSSes with beacon entries When a probe response for an unknown BSS comes in, __cfg80211_bss_update() looks for an existing entry with the same BSSID and a hidden (zero-length or NUL-filled) SSID, and if it finds one it groups them, using the beacon IEs from the existing entry. But that could find another entry without a beacon, if it was also from a probe response (with SSID), so there's a group without beacon elements. If a beacon with a hidden SSID for that BSSID arrives later, cfg80211_combine_bsses() goes looking for the probe response entries that belong to it - i.e. entries with the same BSSID and channel that have no beacon IEs - and finds those two. They are already grouped with each other, so it hits its WARN_ON_ONCE(bss->pub.hidden_beacon_bss) WARN_ON_ONCE(!list_empty(&bss->hidden_list)) which are there because an entry without beacon elements is not supposed to be part of a group yet. Only combine entries when a beacon was already received, ones that are kept separate will be combined when a beacon arrives.",
  "status": "Received",
  "score_type": null,
  "scores": {
    "cvss_v40": null,
    "cvss_v31": null,
    "cvss_v30": null
  },
  "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": []
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98340",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}