{
  "cveId": "CVE-2026-40684",
  "url": "https://patchblox.com/security/cve/CVE-2026-40684",
  "summary": "CVE-2026-40684 is fixed in exim4 on 1 platform, first by DEBIAN-CVE-2026-40684, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "exim4: In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when mal...",
  "description": "In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.",
  "published": "2026-04-30T22:16:25Z",
  "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": 0.00362,
  "epssPercentile": 0.30226,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "exim4",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "4.96-15\u002Bdeb12u9",
      "fix": "DEBIAN-CVE-2026-40684",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40684",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "exim4",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.98.2-1\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-40684",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40684",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "exim4",
      "release": "Debian 14",
      "fixedVersion": "4.99.2-1",
      "fix": "DEBIAN-CVE-2026-40684",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40684",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}