{
  "cveId": "CVE-2026-56114",
  "url": "https://patchblox.com/security/cve/CVE-2026-56114",
  "summary": "CVE-2026-56114 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-56114, released July 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "dhcpcd: dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in dhcp6_...",
  "description": "dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in dhcp6_makemessage() in src/dhcp6.c that allows unauthenticated same-link attackers to write beyond a fixed local buffer by serializing an oversized RFC6603 OPTION_PD_EXCLUDE option body. Attackers can send a crafted DHCPv6 ADVERTISE message containing an IA_PD IAPREFIX /0 with a valid OPTION_PD_EXCLUDE using an exclude prefix length of /121 through /128 to trigger the out-of-bounds write and potentially corrupt adjacent stack memory.",
  "published": "2026-06-23T17:17:09Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00269,
  "epssPercentile": 0.19166,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "dhcpcd",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:10.1.0-11\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2026-56114",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-56114",
      "released": "2026-07-02T14:46:03Z"
    },
    {
      "platform": "linux",
      "product": "dhcpcd",
      "release": "Debian 14",
      "fixedVersion": "1:10.3.2-4",
      "fix": "DEBIAN-CVE-2026-56114",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-56114",
      "released": "2026-07-02T14:46:03Z"
    },
    {
      "platform": "linux",
      "product": "dhcpcd5",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "9.4.1-24~deb12u5",
      "fix": "DEBIAN-CVE-2026-56114",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-56114",
      "released": "2026-07-02T14:46:03Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}