{"id":"CVE-2026-123205","summary":"accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql","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.","modified":"2026-11-05T21:32:22.986012742Z","published":"2026-11-05T18:16:40.464Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/accel-ppp/accel-ppp","events":[{"introduced":"0"},{"fixed":"d80cdc61e82f7beb578f6c8232644f508ec95bb5"},{"fixed":"58e399400c4ef4b71472ab7c2c71c54a677a05a8"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"introduced":"0"},{"fixed":"1.15.0"}]},{"range":[{"fixed":"58e399400c4ef4b71472ab7c2c71c54a677a05a8"}],"source":"REFERENCES_COMMIT"},{"range":[{"fixed":"d80cdc61e82f7beb578f6c8232644f508ec95bb5"}],"source":"REFERENCES_TAG","original_tag":"1.15.0"}]}}],"versions":["1.14.0","1.13.0","1.12.0","1.10.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123205.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","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"}]}