{
  "cveId": "CVE-2025-34468",
  "url": "https://patchblox.com/security/cve/CVE-2025-34468",
  "summary": "CVE-2025-34468 is fixed in 8 products on 1 platform, first by DEBIAN-CVE-2025-34468, released December 31, 2025. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "libcoap3: libcoap versions up to and including 4.3.5, prior to commit 30db3ea, contain a stack-based buffer overflow in address...",
  "description": "libcoap versions up to and including 4.3.5, prior to commit 30db3ea, contain a stack-based buffer overflow in address resolution when attacker-controlled hostname data is copied into a fixed 256-byte stack buffer without proper bounds checking. A remote attacker can trigger a crash and potentially achieve remote code execution depending on compiler options and runtime memory protections. Exploitation requires the proxy logic to be enabled (i.e., the proxy request handling code path in an application using libcoap).",
  "published": "2025-12-31T19:15:43Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00748,
  "epssPercentile": 0.55162,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libcoap",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap-devel",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap-doc",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap-utils",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap-utils-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "4.3.5b-1.fc43",
      "fix": "FEDORA-2026-0CE923A09D",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-0ce923a09d",
      "released": "2026-04-17T10:02:36Z"
    },
    {
      "platform": "linux",
      "product": "libcoap3",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.3.4-1.1\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2025-34468",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-34468",
      "released": "2025-12-31T19:15:43Z"
    },
    {
      "platform": "linux",
      "product": "libcoap3",
      "release": "Debian 14",
      "fixedVersion": "4.3.5-3",
      "fix": "DEBIAN-CVE-2025-34468",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-34468",
      "released": "2025-12-31T19:15:43Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}