{
  "cveId": "CVE-2026-11850",
  "url": "https://patchblox.com/security/cve/CVE-2026-11850",
  "summary": "CVE-2026-11850 is fixed in 37 products on 1 platform, first by krb5-admin-server 1.19.2-2ubuntu0.8, released June 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "krb5-admin-server: An integer underflow vulnerability was found in MIT krb5 in the berval2tl_data() function in plugins/kdb/ldap/libkdb_...",
  "description": "An integer underflow vulnerability was found in MIT krb5 in the berval2tl_data() function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c. The function performs an unsigned subtraction (bv_len - 2) without a prior bounds check. When bv_len is 0 or 1, the subtraction wraps to a large value which is then truncated to uint16_t, yielding 0xFFFE (65534) or 0xFFFF (65535). The subsequent malloc succeeds and memcpy reads up to 65534 bytes from a 0-1 byte buffer, resulting in a heap out-of-bounds read. The attack vector involves a malicious or compromised LDAP KDB backend returning a krbExtraData attribute with bv_len \u0026lt; 2, triggering the underflow when the KDC or kadmind reads principal data.",
  "published": "2026-06-11T03:16:00Z",
  "severity": "Medium",
  "cvss": 5,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H",
  "epss": 0.00271,
  "epssPercentile": 0.19425,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "krb5",
      "release": "Debian 14",
      "fixedVersion": "1.22.1-3",
      "fix": "DEBIAN-CVE-2026-11850",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-11850",
      "released": "2026-06-25T17:23:13Z"
    },
    {
      "platform": "linux",
      "product": "krb5",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.21.3-160000.4.1",
      "fix": "OPENSUSE-SU-2026:21238-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21238-1",
      "released": "2026-07-05T13:38:43Z"
    },
    {
      "platform": "linux",
      "product": "krb5",
      "release": "sles 15.6",
      "fixedVersion": "1.20.1-150600.11.19.1",
      "fix": "SUSE-SU-2026:2848-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2848-1",
      "released": "2026-07-10T11:39:12Z"
    },
    {
      "platform": "linux",
      "product": "krb5",
      "release": "sles 15.7",
      "fixedVersion": "1.20.1-150600.11.19.1",
      "fix": "SUSE-SU-2026:2848-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2848-1",
      "released": "2026-07-10T11:39:12Z"
    },
    {
      "platform": "linux",
      "product": "krb5-admin-server",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.19.2-2ubuntu0.8",
      "fix": "krb5-admin-server 1.19.2-2ubuntu0.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-krb5-admin-server-1.19.2-2ubuntu0.8",
      "released": "2026-06-11T03:16:00Z"
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      "product": "krb5-admin-server",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.20.1-6ubuntu2.7",
      "fix": "krb5-admin-server 1.20.1-6ubuntu2.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-krb5-admin-server-1.20.1-6ubuntu2.7",
      "released": "2026-06-11T03:16:00Z"
    },
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      "platform": "linux",
      "product": "krb5-admin-server",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.22.1-2ubuntu4.1",
      "fix": "krb5-admin-server 1.22.1-2ubuntu4.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-krb5-admin-server-1.22.1-2ubuntu4.1",
      "released": "2026-06-11T03:16:00Z"
    },
    {
      "platform": "linux",
      "product": "krb5-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.21.3-8.amzn2023.0.1",
      "fix": "ALAS2023-2026-1939",
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      "fix": "ALAS2023-2026-1939",
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      "released": "2026-07-20T09:00:00Z"
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      "fix": "ALAS2023-2026-1939",
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      "released": "2026-07-20T09:00:00Z"
    },
    {
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      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-krb5-gss-samples-1.19.2-2ubuntu0.8",
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      "release": "Ubuntu 24.04.5 LTS (noble)",
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    {
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  "attribution": {
    "text": "Data: Patchblox Patch Radar",
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    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}