{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f"
            },
            {
              "fixed": "d31f655e44631891788ca67018ec5e1ed1c7de86"
            },
            {
              "fixed": "03525b632908b049f4d04cc8a71cdff2329589cf"
            },
            {
              "fixed": "5cc54a000960bc88f8c58940164dca0e601ab39c"
            },
            {
              "fixed": "437f3727b4fd715266c296435c116288f82666fd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.17.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98709.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: count only matching reservations in reserved switch\n\nieee80211_vif_use_reserved_switch() validates a replacement by counting\nassigned links on ctx-\u003ereplace_ctx and treating reservations too\nbroadly. A link can still be assigned to the old channel context while\nholding a reservation that belongs to a different replacement\noperation.\n\nThat can make the current replacement appear complete too early. If\nanother link finalizes first, the function can free the\nWILL_BE_REPLACED chanctx while the unmatched link and driver still use\nit, leading to a use-after-free in later beacon generation.\n\nRequire an in-place reservation to point at the current replacement\ncontext, and require the reserved and assigned contexts to be the\nmatching replacement pair, before counting or moving the link.",
  "id": "CVE-2026-98709",
  "modified": "2026-10-20T02:30:51.514013785Z",
  "published": "2026-10-18T15:46:39.290Z",
  "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/03525b632908b049f4d04cc8a71cdff2329589cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98709.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98709"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mac80211: count only matching reservations in reserved switch"
}