Buffer overflow in the cluster_process_heartbeat function in cluster.c in layer 2…
Priority LOW 38Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Buffer overflow in the cluster_process_heartbeat function in cluster.c in layer 2 tunneling protocol network server (l2tpns) before 2.1.21 allows remote attackers to cause a denial of service via a large heartbeat packet.
Why it matters now
EPSS 0.02312 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:l2tpns:l2tpns:1.1:*:*:*:*:*:*:* | 1.1 | Vulnerable | L2tpns |
| cpe:2.3:a:l2tpns:l2tpns:2.0.13:*:*:*:*:*:*:* | 2.0.13 | Vulnerable | L2tpns |
| cpe:2.3:a:l2tpns:l2tpns:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | L2tpns |
| cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:* | 3.1 | Vulnerable | Debian |
- cpe:2.3:a:l2tpns:l2tpns:1.1:*:*:*:*:*:*:* Versions 1.1 Vulnerable ·L2tpns
- cpe:2.3:a:l2tpns:l2tpns:2.0.13:*:*:*:*:*:*:* Versions 2.0.13 Vulnerable ·L2tpns
- cpe:2.3:a:l2tpns:l2tpns:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·L2tpns
- cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-5873
- 2026-10-03 Alias added: GHSA-548f-88j9-xqq6
References
Sources
- CVE-2006-5873 · CVE Program
- CVE-2006-5873 · NVD
- FIRST EPSS
- GHSA-548f-88j9-xqq6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences