CVE-2011-3603: The router advertisement daemon (radvd) before 1.8.2 does not properly handle errors in the privsep_init funct

Q: How do I fix CVE-2011-3603?

router advertisement daemon: upgrade to newer than 1.8.1. Exact commands for each OS are on this page.

Q: Is CVE-2011-3603 being exploited?

CVE-2011-3603 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-2011-3603 affect?

CVE-2011-3603 affects router advertisement daemon. Severity is medium (CVSS 4.4). The router advertisement daemon (radvd) before 1.8.2 does not properly handle errors in the privsep_init function, which causes the radvd daemon to run as root and has an unspecified impact.

Q: How urgent is CVE-2011-3603?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 4.4UPGRADE

CVE-2011-3603 is a medium-severity flaw (CVSS 4.4) affecting router advertisement daemon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The router advertisement daemon (radvd) before 1.8.2 does not properly handle errors in the privsep_init function, which causes the radvd daemon to run as root and has an unspecified impact.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-20
Published	2014-04-27
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: litech

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

Am I affected?

Timeline

2014-04-27 21:55 UTCPublished CVE record published
2026-06-16 23:33 UTCUpdated Record last modified

litech router advertisement daemon UPGRADE

Affected: <= 1.8.1

Fixed in: newer than 1.8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy router-advertisement-daemon || rpm -q router-advertisement-daemon || router-advertisement-daemon --version

2. UPGRADE to newer than 1.8.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade router-advertisement-daemon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade router-advertisement-daemon

Note

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

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-2011-3603?

router advertisement daemon: upgrade to newer than 1.8.1. Exact commands for each OS are on this page.

Is CVE-2011-3603 being exploited?

CVE-2011-3603 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-2011-3603 affect?

CVE-2011-3603 affects router advertisement daemon. Severity is medium (CVSS 4.4). The router advertisement daemon (radvd) before 1.8.2 does not properly handle errors in the privsep_init function, which causes the radvd daemon to run as root and has an unspecified impact.

How urgent is CVE-2011-3603?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2014-8153 MEDIUM 4.0 DOWNGRADE DOWNGRADE The L3 agent in OpenStack Neutron 2014.2.x before 2014.2.2, when using radvd 2.0+, allows remote authenticated
CVE-2011-3605 MEDIUM 5.0 UPGRADE The process_rs function in the router advertisement daemon (radvd) before 1.8.2, when UnicastOnly is enabled,
CVE-2011-3604 HIGH 7.5 UPGRADE The process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remote attackers to cau
CVE-2011-3602 MEDIUM 6.4 UPGRADE Directory traversal vulnerability in device-linux.c in the router advertisement daemon (radvd) before 1.8.2 al
CVE-2011-3601 HIGH 7.5 UPGRADE Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remo

References

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