{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "1.15.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "58e399400c4ef4b71472ab7c2c71c54a677a05a8"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "1.15.0",
                "range": [
                  {
                    "fixed": "d80cdc61e82f7beb578f6c8232644f508ec95bb5"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d80cdc61e82f7beb578f6c8232644f508ec95bb5"
            },
            {
              "fixed": "58e399400c4ef4b71472ab7c2c71c54a677a05a8"
            }
          ],
          "repo": "https://github.com/accel-ppp/accel-ppp",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123205.json"
  },
  "details": "accel-ppp before 1.15.0 contains a heap buffer overflow vulnerability in the tcp, syslog and pgsql log targets that allows unauthenticated remote peers to overflow fixed heap buffers by producing log lines exceeding LOG_MAX_SIZE. Attackers within client-ip-range can send an L2TP Start-Control-Connection-Request with many string AVPs when verbose logging is enabled to corrupt heap memory and crash the daemon.",
  "id": "CVE-2026-123205",
  "modified": "2026-11-05T21:15:52.169897397Z",
  "published": "2026-11-05T18:16:40.464Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123205.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/accel-ppp/accel-ppp"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67"
    },
    {
      "type": "FIX",
      "url": "https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/accel-ppp/accel-ppp/pull/374"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/accel-ppp/accel-ppp/releases/tag/1.15.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123205"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/accel-ppp-before-1.15.0-heap-based-buffer-overflow-via-oversized-log-lines-in-log-tcp-log-syslog-log-pgsql"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql"
}