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Vulnerability record · CVE-2006-3121 · published 17 August 2006

CVE-2006-3121: High availability linux project heartbeat vulnerability

HHigh Availability Linux Project · Heartbeat

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.

5.0 CVSS 2.0 Medium EPSS 14% · top 3.7% CWE-399 · CWE-399
5.0CVSS 2.0 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
28References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/21505 Vendor Advisory
http://secunia.com/advisories/21511 Vendor Advisory
http://secunia.com/advisories/21518 Vendor Advisory
http://secunia.com/advisories/21521 Vendor Advisory
http://secunia.com/advisories/21629 Vendor Advisory
http://security.gentoo.org/glsa/glsa-200608-23.xml
http://www.debian.org/security/2006/dsa-1151 Patch
http://www.linux-ha.org/SecurityIssues Patch
http://www.linux-ha.org/_cache/SecurityIssues__sec03.txt
http://www.mandriva.com/security/advisories?name=MDKSA-2006:142
http://www.securityfocus.com/bid/19516 Patch
http://www.ubuntu.com/usn/usn-335-1
http://www.vupen.com/english/advisories/2006/3288 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/28396
http://secunia.com/advisories/21505 Vendor Advisory
http://secunia.com/advisories/21511 Vendor Advisory
http://secunia.com/advisories/21518 Vendor Advisory
http://secunia.com/advisories/21521 Vendor Advisory
http://secunia.com/advisories/21629 Vendor Advisory
http://security.gentoo.org/glsa/glsa-200608-23.xml
http://www.debian.org/security/2006/dsa-1151 Patch
http://www.linux-ha.org/SecurityIssues Patch
http://www.linux-ha.org/_cache/SecurityIssues__sec03.txt
http://www.mandriva.com/security/advisories?name=MDKSA-2006:142
http://www.securityfocus.com/bid/19516 Patch
http://www.ubuntu.com/usn/usn-335-1
http://www.vupen.com/english/advisories/2006/3288 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/28396

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2006-3121), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.