dnsmasq — security advisory

{
  "id": "ad991cbdd29714a89e2bf46398b2fa50f9484db91b200f0bb969c105407c0871",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-6507",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-6507",
    "summary": "A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with the `--dhcp-split-relay` option. This can lead to memory corruption, causing the dnsmasq daemon to crash and resulting in a denial of service (DoS).",
    "evidence": "osv:DEBIAN-CVE-2026-6507",
    "products": [
      {
        "name": {
          "value": "dnsmasq",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.92-4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "2.91-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92-1+exp1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92-1~exp1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92~rc1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.92~rc3-1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-6507",
      "aliases": [
        "DEBIAN-CVE-2026-6507"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.92-4"
                }
              ]
            }
          ],
          "package": {
            "name": "dnsmasq",
            "purl": "pkg:deb/debian/dnsmasq?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "2.91-1",
            "2.92-1",
            "2.92-1+exp1",
            "2.92-1~exp1",
            "2.92-2",
            "2.92-3",
            "2.92~rc1-1",
            "2.92~rc3-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6507.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T11:47:34.760780479Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-6507"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-6507"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-6507",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450943,
  "published_at": "2026-04-17T13:16:14.967+00:00"
}