{
  "cveId": "CVE-2026-48690",
  "url": "https://patchblox.com/security/cve/CVE-2026-48690",
  "summary": "CVE-2026-48690 is fixed in fastnetmon on 1 platform, first by DEBIAN-CVE-2026-48690, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "fastnetmon: FastNetMon Community Edition through 1.2.9 contains an integer overflow vulnerability in the packet capture buffer al...",
  "description": "FastNetMon Community Edition through 1.2.9 contains an integer overflow vulnerability in the packet capture buffer allocation. In src/packet_storage.hpp, the allocate_buffer() function computes memory_size_in_bytes as \u0027buffer_size_in_packets * (max_captured_packet_size \u002B sizeof(fastnetmon_pcap_pkthdr_t)) \u002B sizeof(fastnetmon_pcap_file_header_t)\u0027 using unsigned int (32-bit) arithmetic. With max_captured_packet_size=1500 and sizeof(fastnetmon_pcap_pkthdr_t)=16, each packet requires approximately 1516 bytes. If buffer_size_in_packets exceeds approximately 2,832,542, the multiplication overflows, resulting in a much smaller allocation than expected. Subsequent write_packet() calls then write past the allocated buffer, causing heap corruption. The buffer_size_in_packets value is derived from the ban_details_records_count configuration parameter, which is parsed using atoi() with no overflow checking.",
  "published": "2026-05-26T17:16:53Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
  "epss": 0.00116,
  "epssPercentile": 0.01645,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.2.9-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-48690",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48690",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Debian 14",
      "fixedVersion": "1.2.9-1",
      "fix": "DEBIAN-CVE-2026-48690",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48690",
      "released": "2026-06-24T14:07:24Z"
    }
  ],
  "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"
  }
}