{
  "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-2026-49419",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-49419",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-19T04:32:39.446Z",
    "updatedAt": "2026-08-20T18:35:07.115Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "Jail reference count underflow",
      "summary": "When the JAIL_AT_DESC flag is specified, kern_jail_set() and kern_jail_get() released the reference to the caller's current prison before looking up the jail descriptor.  If the descriptor lookup failed, error-handling paths released the same reference a second time.\n\nAn unprivileged local user can trigger a prison reference count underflow, which may cause the prison structure to be freed while still in use.  When this is done on the jail host, the bug will generally result in an immediate panic.  However, if the user is running in a jail, then it may be possible to exploit the bug to elevate privileges.",
      "affected": [
        {
          "vendor": "FreeBSD",
          "product": "FreeBSD",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "15.1-RELEASE",
              "status": "affected",
              "versionType": "release",
              "lessThan": "p1"
            },
            {
              "version": "15.0-RELEASE",
              "status": "affected",
              "versionType": "release",
              "lessThan": "p11"
            }
          ]
        }
      ]
    }
  }
}