CVE-2006-3815: heartbeat.c in heartbeat before 2.0.6 sets insecure permissions in a shmget call for shared memory, which allo

Q: How do I fix CVE-2006-3815?

heartbeat: upgrade to newer than 2.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2006-3815 being exploited?

CVE-2006-3815 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2006-3815 affect?

CVE-2006-3815 affects heartbeat. Severity is low (CVSS 2.1). heartbeat.c in heartbeat before 2.0.6 sets insecure permissions in a shmget call for shared memory, which allows local users to cause an unspecified denial of service via unknown vectors, possibly during a short time window on startup.

Q: How urgent is CVE-2006-3815?

Priority 31/100. Public exploit reference; On your watchlist

Routine

LOW 2.1WATCHLISTUPGRADE

CVE-2006-3815 is a low-severity flaw (CVSS 2.1) affecting heartbeat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

heartbeat.c in heartbeat before 2.0.6 sets insecure permissions in a shmget call for shared memory, which allows local users to cause an unspecified denial of service via unknown vectors, possibly during a short time window on startup.

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-264
Published	2006-07-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: linux-ha

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-07-25 13:22 UTCPublished CVE record published
2026-06-16 22:27 UTCUpdated Record last modified

linux-ha heartbeat UPGRADE

Affected: <= 2.0.5

Fixed in: newer than 2.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy heartbeat || rpm -q heartbeat || heartbeat --version

2. UPGRADE to newer than 2.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade heartbeat

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade heartbeat

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Linux-HA Heartbeat 1.2.3/2.0.x - Insecure Default Permissions on Shared Memory

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2006-3815?

heartbeat: upgrade to newer than 2.0.5. Exact commands for each OS are on this page.

Is CVE-2006-3815 being exploited?

CVE-2006-3815 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2006-3815 affect?

CVE-2006-3815 affects heartbeat. Severity is low (CVSS 2.1). heartbeat.c in heartbeat before 2.0.6 sets insecure permissions in a shmget call for shared memory, which allows local users to cause an unspecified denial of service via unknown vectors, possibly during a short time window on startup.

How urgent is CVE-2006-3815?

Priority 31/100. Public exploit reference; On your watchlist

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References

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