CVE-2018-6921

Name: CVE-2018-6921
Creator: NVD / NIST
Published: 2018-05-08T19:29:00.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.32%

Last modified Jun 17, 2026

CVE-2018-6921 is a vulnerability of currently unknown severity. In FreeBSD before 11.1-STABLE(r332066) and 11.1-RELEASE-p10, due to insufficient initialization of memory copied to userland in the network subsystem, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts of privileged kernel data.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

In FreeBSD before 11.1-STABLE(r332066) and 11.1-RELEASE-p10, due to insufficient initialization of memory copied to userland in the network subsystem, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts of privileged kernel data.

Metrics

EPSS Probability

0.32%

24.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	>= 11.0, < 11.1

References

http://www.securityfocus.com/bid/104118Third Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-EN-18:05.mem.ascVendor Advisory
http://www.securityfocus.com/bid/104118Third Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-EN-18:05.mem.ascVendor Advisory

Timeline

Published: May 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-6921?

How severe is CVE-2018-6921?

Severity scoring for CVE-2018-6921 is pending analysis. The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2018-6921?

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-2018-6921?

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

Scan your code now

Source: NVD / NIST