CVE-2026-123205
accel-ppp before 1.15.0 Heap-based Buffer Overflow via oversized log lines in log_tcp/log_syslog/log_pgsql
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| accel-ppp accel-ppp accel-ppp/accel-ppp
github |
≥ 0; < 1.15.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.3 high |
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 | CNA: VulnCheck |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H | CNA: VulnCheck |
| 4.0 / 8.3 high |
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 | NVD: [email protected] |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/accel-ppp/accel-ppp/pull/374CNA: VulnCheck · issue-tracking, patch
- https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8CNA: VulnCheck · patch
- https://github.com/accel-ppp/accel-ppp/releases/tag/1.15.0CNA: VulnCheck · release-notes
- https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67CNA: VulnCheck · technical-description
- 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-pgsqlCNA: VulnCheck · third-party-advisory
- https://github.com/accel-ppp/accel-ppp/blob/048d31cb446879e0d1a1471b4ab99135a92bf289/accel-pppd/logs/log_tcp.c#L55-L67[email protected]
- https://github.com/accel-ppp/accel-ppp/commit/58e399400c4ef4b71472ab7c2c71c54a677a05a8[email protected]
- https://github.com/accel-ppp/accel-ppp/pull/374[email protected]
- https://github.com/accel-ppp/accel-ppp/releases/tag/1.15.0[email protected]
- 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[email protected]
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