{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc"
            },
            {
              "fixed": "4cd6a518ce7527284bbc9baab5fa2453a7d477c2"
            },
            {
              "fixed": "74ed0d992f392c75e1969415527e06df3f7a4034"
            },
            {
              "fixed": "3658093df69849daf4f813a8f087f358e13be203"
            },
            {
              "fixed": "73365b81630b57e1a1f9d50dc87281797855c2ac"
            },
            {
              "fixed": "7405dd19bda4537a2843637d8d7bed1efd4776cf"
            },
            {
              "fixed": "86235be788094131912e9bd8412b358d91d99f49"
            },
            {
              "fixed": "332ea1502c46f53375cb109fa82bfaff818f3a41"
            },
            {
              "fixed": "068843ed0902c552a13860c5ec6b2ca65b57a065"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.9.0"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98340.json"
  },
  "details": "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-\u003epub.hidden_beacon_bss)\n  WARN_ON_ONCE(!list_empty(\u0026bss-\u003ehidden_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.",
  "id": "CVE-2026-98340",
  "modified": "2026-10-08T02:30:17.020525899Z",
  "published": "2026-10-06T08:46:30.796Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98340.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98340"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: cfg80211: only group hidden BSSes with beacon entries"
}