{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "krb5"
              },
              {
                "fixed": "1.22.2"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8570e77819563e036027e1da789d08ec9333ed4d"
            },
            {
              "fixed": "a88a18cafa1040a0c4f9c8d08288fc98831ec86d"
            },
            {
              "fixed": "f6e2c397ceda6467ebbaab8ed66d4895c9f1d6a7"
            }
          ],
          "repo": "https://github.com/krb5/krb5",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107708.json"
  },
  "details": "MIT krb5 through 1.22.2 contains a NULL pointer dereference vulnerability in the KDC's get_pac_princ_with_realm() that returns success while leaving the client principal NULL on malformed names. A malicious or compromised cross-realm trusted KDC can send an S4U2Proxy request with a PAC carrying a malformed client name to crash krb5kdc and deny authentication.",
  "id": "CVE-2026-107708",
  "modified": "2026-10-10T02:31:01.749978922Z",
  "published": "2026-10-08T20:15:53.534Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107708.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107708"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/mit-krb5-through-1.22.2-kdc-null-pointer-dereference-via-s4u2proxy-pac"
    },
    {
      "type": "FIX",
      "url": "https://github.com/krb5/krb5/commit/a88a18cafa1040a0c4f9c8d08288fc98831ec86d"
    },
    {
      "type": "FIX",
      "url": "https://github.com/krb5/krb5/commit/f6e2c397ceda6467ebbaab8ed66d4895c9f1d6a7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/krb5/krb5/pull/1510"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/krb5/krb5"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/krb5/krb5/blob/krb5-1.22.2-final/src/kdc/kdc_util.c#L639-L676"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MIT krb5 through 1.22.2 KDC NULL Pointer Dereference via S4U2Proxy PAC"
}