exim4 — security advisory

{
  "id": "ac65e3a072f75b647d4b27fc481a23a7601000e1a8172cc8fc318a8636fd10f8",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-67896",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2025-67896",
    "summary": "Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.",
    "evidence": "osv:DEBIAN-CVE-2025-67896",
    "products": [
      {
        "name": {
          "value": "exim4",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.99-7",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.98.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.98.2-1+hurd.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.98.2-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-4~bpo13+1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-6~bpo13+1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99-7~bpo13+1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99~RC1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99~RC2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99~RC3-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.99~RC3-2",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2025-67896",
      "aliases": [
        "DEBIAN-CVE-2025-67896"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.99-7"
                }
              ]
            }
          ],
          "package": {
            "name": "exim4",
            "purl": "pkg:deb/debian/exim4?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "4.98.2-1",
            "4.98.2-1+hurd.1",
            "4.98.2-2",
            "4.99-1",
            "4.99-2",
            "4.99-3",
            "4.99-4",
            "4.99-4~bpo13+1",
            "4.99-5",
            "4.99-6",
            "4.99-6~bpo13+1",
            "4.99-7~bpo13+1",
            "4.99~RC1-1",
            "4.99~RC2-1",
            "4.99~RC3-1",
            "4.99~RC3-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-67896.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-15T09:47:31.716784787Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-67896"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2025-67896"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-67896",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 327612,
  "published_at": "2025-12-14T04:15:50.287+00:00"
}