The peel_netstring function in cl_netstring.c in the heartbeat subsystem in…
Priority LOW 38CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
The peel_netstring function in cl_netstring.c in the heartbeat subsystem in High-Availability Linux before 1.2.5, and 2.0 before 2.0.7, allows remote attackers to cause a denial of service (crash) via the length parameter in a heartbeat message.
Why it matters now
EPSS 0.13589 96th 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 · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:high_availability_linux_project:heartbeat:1.2.3:*:*:*:*:*:*:* | 1.2.3 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:1.2.4:*:*:*:*:*:*:* | 1.2.4 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.1:*:*:*:*:*:*:* | 2.0.1 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.2:*:*:*:*:*:*:* | 2.0.2 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.3:*:*:*:*:*:*:* | 2.0.3 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.4:*:*:*:*:*:*:* | 2.0.4 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.5:*:*:*:*:*:*:* | 2.0.5 | Vulnerable | High Availability Linux Project |
| cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.6:*:*:*:*:*:*:* | 2.0.6 | Vulnerable | High Availability Linux Project |
- cpe:2.3:a:high_availability_linux_project:heartbeat:1.2.3:*:*:*:*:*:*:* Versions 1.2.3 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:1.2.4:*:*:*:*:*:*:* Versions 1.2.4 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.1:*:*:*:*:*:*:* Versions 2.0.1 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.2:*:*:*:*:*:*:* Versions 2.0.2 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.3:*:*:*:*:*:*:* Versions 2.0.3 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.4:*:*:*:*:*:*:* Versions 2.0.4 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.5:*:*:*:*:*:*:* Versions 2.0.5 Vulnerable ·High Availability Linux Project
- cpe:2.3:a:high_availability_linux_project:heartbeat:2.0.6:*:*:*:*:*:*:* Versions 2.0.6 Vulnerable ·High Availability Linux Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-3121
- 2026-10-03 Alias added: GHSA-qj99-gqqj-q94c
References
More High Availability Linux Project Heartbeat vulnerabilities
- TI-2005-02110 High Availability Linux Project Heartbeat 1.2.3 allows local users to overwrite arbitrary… CVSS 2.0LOW 2.1
Sources
- CVE-2006-3121 · CVE Program
- CVE-2006-3121 · NVD
- FIRST EPSS
- GHSA-qj99-gqqj-q94c · GitHub Advisory Database · CC BY 4.0
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