{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123205","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-05T17:58:51.544Z","datePublished":"2026-11-05T18:16:40.464Z","dateUpdated":"2026-11-05T18:16:40.464Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T18:16:40.464Z"},"datePublic":"2026-10-28T00:00:00.000Z","title":"accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Heap-based Buffer Overflow","cweId":"CWE-122","type":"CWE"}]}],"affected":[{"vendor":"accel-ppp","product":"accel-ppp","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"1.15.0","status":"affected","versionType":"semver"}],"packageURL":"pkg:github/accel-ppp/accel-ppp","repo":"https://github.com/accel-ppp/accel-ppp"}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:accel-ppp:accel-ppp:*:*:*:*:*:*:*:*","versionEndExcluding":"1.15.0"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.3,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/accel-ppp/accel-ppp/pull/374","tags":["issue-tracking","patch"]},{"url":"https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8","tags":["patch"]},{"url":"https://github.com/accel-ppp/accel-ppp/releases/tag/1.15.0","tags":["release-notes"],"name":"accel-ppp 1.15.0 Release Notes"},{"url":"https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67","tags":["technical-description"]},{"name":"VulnCheck Advisory: accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql","tags":["third-party-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"}],"credits":[{"lang":"en","value":"Deus Rex","type":"finder"},{"lang":"en","value":"Denys Fedoryshchenko (nuclearcat)","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}}}}