CVE-2011-3601: Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remo

Q: How do I fix CVE-2011-3601?

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

Q: Is CVE-2011-3601 being exploited?

CVE-2011-3601 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-2011-3601 affect?

CVE-2011-3601 affects router advertisement daemon. Severity is high (CVSS 7.5). Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative value in a label_len value.

Q: How urgent is CVE-2011-3601?

Priority 49/100. High severity; EPSS top 9%: very likely to be exploited

This month

HIGH 7.5UPGRADE

CVE-2011-3601 is a high-severity flaw (CVSS 7.5) affecting router advertisement daemon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative value in a label_len value.

Why this priority

High severity
EPSS top 9%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-119
Published	2014-02-17
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

2014-02-17 16:55 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-2011-3601?

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

Is CVE-2011-3601 being exploited?

CVE-2011-3601 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-2011-3601 affect?

CVE-2011-3601 affects router advertisement daemon. Severity is high (CVSS 7.5). Buffer overflow in the process_ra function in the router advertisement daemon (radvd) before 1.8.2 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative value in a label_len value.

How urgent is CVE-2011-3601?

Priority 49/100. High severity; EPSS top 9%: very likely to be exploited

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-2011-3603 MEDIUM 4.4 UPGRADE The router advertisement daemon (radvd) before 1.8.2 does not properly handle errors in the privsep_init funct
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

References

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