{
  "cveId": "CVE-2026-13002",
  "url": "https://patchblox.com/security/cve/CVE-2026-13002",
  "summary": "CVE-2026-13002 is fixed in 5 products on 1 platform, first by ALAS2023-2026-1729, released May 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Dnsmasq: infinite loop dos in dnssec nsec/nsec3 type bitmap parsing",
  "description": "Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities:\nCVE-2026-5172:\n\tA buffer overflow in dnsmasq\u0027s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record\u0027s end.\n\nCVE-2026-4893:\n\tAn information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.\n\nCVE-2026-4892:\n\tA heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.\n\nCVE-2026-4891:\n\tA heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.\n\nCVE-2026-4890:\n\tA Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.\n\nCVE-2026-13002:\n\tA flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.",
  "published": "2026-05-25T09:00:00Z",
  "severity": "Moderate",
  "cvss": 4.4,
  "cwe": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-13002",
  "fixes": [
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1729",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1729",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1729",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1729",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1729",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1729",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1729",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1729",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1729",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1729",
      "released": "2026-05-25T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T13:56:55Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}