CVE-2022-27881

Name: CVE-2022-27881
Creator: NVD / NIST
Published: 2022-03-25T18:15:27.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.87%

Last modified Jun 17, 2026

CVE-2022-27881 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. engine.c in slaacd in OpenBSD 6.9 and 7.0 before 2022-02-21 has a buffer overflow triggerable by an IPv6 router advertisement with more than seven nameservers. NOTE: privilege separation and pledge can prevent exploitation.. EPSS estimates a 1.87% chance of exploitation in the next 30 days.

Description

engine.c in slaacd in OpenBSD 6.9 and 7.0 before 2022-02-21 has a buffer overflow triggerable by an IPv6 router advertisement with more than seven nameservers. NOTE: privilege separation and pledge can prevent exploitation.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.87%

76.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Openbsd	Openbsd	6.9
Openbsd	Openbsd	7.0

References

https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.htmlExploit, Patch, Third Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sigPatch, Release Notes, Vendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/014_slaacd.patch.sigPatch, Release Notes, Vendor Advisory
https://security.netapp.com/advisory/ntap-20220506-0005/Third Party Advisory
https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.htmlExploit, Patch, Third Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/030_slaacd.patch.sigPatch, Release Notes, Vendor Advisory
https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/014_slaacd.patch.sigPatch, Release Notes, Vendor Advisory
https://security.netapp.com/advisory/ntap-20220506-0005/Third Party Advisory

Timeline

Published: Mar 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-27881?

How severe is CVE-2022-27881?

CVE-2022-27881 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.87% probability of exploitation in the next 30 days.

How do I fix CVE-2022-27881?

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-2022-27881?

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

Scan your code now

Source: NVD / NIST