{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-98870",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98870",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-23T11:37:07.113Z",
    "updatedAt": "2026-10-23T11:37:07.113Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ksmbd: remove stale channels from all sessions on teardown",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: remove stale channels from all sessions on teardown\n\nksmbd_sessions_deregister() removes a connection's channels from other\nsessions' channel lists only while conn->binding is still set:\n\n\tif (conn->binding) {\n\t\thash_for_each_safe(sessions_table, ...)\n\t\t\tksmbd_chann_del(conn, sess);\n\t}\n\nconn->binding is a transient flag: it is cleared once a binding\nSESSION_SETUP completes, and also by a subsequent non-binding\nSESSION_SETUP on the same connection (a reauthentication on a bound\nchannel, or a new SessionId==0 setup). A connection that has bound a\nchannel into another session's ksmbd_chann_list and then clears\nconn->binding leaves that channel behind when it disconnects: the\nchannel, whose chann->conn points at the now freed struct ksmbd_conn,\nstays on the owner session's list.\n\nWhen the owning connection later tears down, the second loop\ndereferences the stale channel:\n\n\txa_for_each(&sess->ksmbd_chann_list, chann_id, chann)\n\t\tif (chann->conn != conn)\n\t\t\tksmbd_conn_set_exiting(chann->conn);   /* freed */\n\nwhich is a use-after-free write into the freed ksmbd_conn (the same\nstale channel is also walked by show_proc_session() through /proc). The\nsession is leaked as well, because its channel list never empties.\n\nRemove the conn->binding gate so a connection always removes its\nchannels from every session on teardown.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b1b6ed903a6e2b3505a48706bcd499b447ef9e44",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f8200bb4994e65a2e5c5b314789eeae39078619d"
            },
            {
              "version": "47b018dba6ec7ebf403fd2d1e713bc7acc9bbb23",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9cd6d714d3ca0cff296542dc989696884e41970f"
            },
            {
              "version": "9ef4dfd5edbd02f4bf10cd420a30896093d98a67",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b145f9b56c87f9c23ad5464ab0844dbc1de12b36"
            },
            {
              "version": "5a5b0b7a01fe19b383b3c046546b5ae30c1a7d71",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a15cae16f4432a5ad919ee633e31b07178492955"
            },
            {
              "version": "faf8578c77f3d846aca9cd882c293e03eafcc6df",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b10665730fbf6b5e45fe422badcbbc3f0df96ef5"
            },
            {
              "version": "e632f21a8bc0c59abc4960482836ac3782db93c0",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.222",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.16"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": []
        }
      ]
    }
  }
}