{
  "cveId": "CVE-2026-123604",
  "url": "https://patchblox.com/security/cve/CVE-2026-123604",
  "summary": "CVE-2026-123604 is fixed in rust-hickory-resolver on 1 platform by DEBIAN-CVE-2026-123604 (version 0.26.3-1), released November 9, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "rust-hickory-resolver: Hickory DNS hickory-resolver 0.26.0-beta.1 before 0.26.2 contains an unbounded retry loop in NameServerPool::try_send...",
  "description": "Hickory DNS hickory-resolver 0.26.0-beta.1 before 0.26.2 contains an unbounded retry loop in NameServerPool::try_send, which re-queues truncated (TC) responses without checking the answering transport or counting iterations. A malicious authoritative server returning TC=1 on every transport keeps the resolver spinning on a persistent TCP connection until the 5-second request deadline expires, causing resource exhaustion.",
  "published": "2026-11-08T02:16:55Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00343,
  "epssPercentile": 0.28135,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "rust-hickory-resolver",
      "release": "Debian 14",
      "fixedVersion": "0.26.3-1",
      "fix": "DEBIAN-CVE-2026-123604",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-123604",
      "released": "2026-11-09T02:18:44Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T01:20:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}