{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322"
            },
            {
              "fixed": "b0b32d3f163d24ea7134380666193bf398e9dc0b"
            },
            {
              "fixed": "f6b34a7d64324faf28eedc0f8678b0f832f1cc36"
            },
            {
              "fixed": "304a874670a0b6ab5589a7f60b4af0251797b121"
            },
            {
              "fixed": "7775759e3cb35ef5a571b2d877c2a9b70a5d5f08"
            },
            {
              "fixed": "3d76b45e8432c0d75fcb9e90d92eaa3176898adf"
            },
            {
              "fixed": "4b54d01b48445b66c9e576de92b90a3a3ae7b34a"
            },
            {
              "fixed": "875835377d8d62c849b4eb03a7abfafa71d7668f"
            },
            {
              "fixed": "4504f3960dc4501c73be9f99eabda2e26e9db41e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.1.0"
            },
            {
              "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-2026-98422.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: reset the AP_VLAN tailroom counter on ifdown\n\nOn ifup, AP_VLAN interfaces get crypto_tx_tailroom_needed_cnt from\nthe AP interface, but it's never decremented again unless the AP is\nalso brought down. Thus, bringing the same AP_VLAN up again will\nincrement the counter again and eventually hit the sanity check:\n\n  WARN_ON_ONCE(sdata-\u003ecrypto_tx_tailroom_needed_cnt !=\n               master-\u003ecrypto_tx_tailroom_needed_cnt);\n\nReset it on ifdown to avoid that.",
  "id": "CVE-2026-98422",
  "modified": "2026-10-15T02:30:26.574344947Z",
  "published": "2026-10-14T13:27:50.789Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98422.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98422"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown"
}