{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"accel-ppp/accel-ppp","product":"accel-ppp","source":"CNA: VulnCheck","vendor":"accel-ppp","versions":[{"lessThan":"1.15.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-123205","cwes":["CWE-122"],"description":"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.","epss":{"date":"2026-11-09","percentile":0.36337,"score":0.00417},"exploits":[],"kev":null,"metrics":[{"score":8.3,"severity":"high","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},{"score":8.3,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":6.5,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"}],"modifiedAt":1794246310829,"publishedAt":1793902600464,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/accel-ppp/accel-ppp/pull/374"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/accel-ppp/accel-ppp/releases/tag/1.15.0"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67"},{"source":"CNA: VulnCheck","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"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/accel-ppp/accel-ppp/pull/374"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/accel-ppp/accel-ppp/releases/tag/1.15.0"},{"source":"disclosure@vulncheck.com","tags":[],"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"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/accel-ppp/accel-ppp/pull/374"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8"}],"revision":"3df717e59ab6559499e423ff7d2500a780c6d74ac4d358118cd04a7de2302ead","sources":[{"modifiedAt":1794246310829,"name":"CNA: VulnCheck","retrievedAt":1794247816160,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123205"},{"modifiedAt":1793906239867,"name":"NVD","retrievedAt":1793946366997,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123205"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794247848484,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123205"}],"ssvc":{"assessedAt":1794245740023,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql","updatedAt":1794247848484}