CVE-2011-2393

Name: CVE-2011-2393
Creator: NVD / NIST
Published: 2012-02-02T17:55:00.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.98%

Last modified Jun 16, 2026

CVE-2011-2393 is a vulnerability of currently unknown severity. The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD, NetBSD, and possibly other BSD-based operating systems allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, a similar vulnerability to CVE-2010-4670.. EPSS estimates a 1.98% chance of exploitation in the next 30 days.

Description

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD, NetBSD, and possibly other BSD-based operating systems allows remote attackers to cause a denial of service (CPU consumption and device hang) by sending many Router Advertisement (RA) messages with different source addresses, a similar vulnerability to CVE-2010-4670.

Metrics

EPSS Probability

1.98%

77.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	All versions
Netbsd	Netbsd	All versions

References

Timeline

Published: Feb 2, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-2393?

How severe is CVE-2011-2393?

Severity scoring for CVE-2011-2393 is pending analysis. The EPSS model estimates a 1.98% probability of exploitation in the next 30 days.

How do I fix CVE-2011-2393?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-2393?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST