CVE-2018-6925

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-28 · updated 2026-06-17
Weakness: CWE-476

Description

In FreeBSD before 11.2-STABLE(r338986), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338985), and 10.4-RELEASE-p13, due to improper maintenance of IPv6 protocol control block flags through various failure paths, an unprivileged authenticated local user may be able to cause a NULL pointer dereference causing the kernel to crash.

Affected products

FreeBSD: before 11.2; 10.4, 10.4-p13, 11.1-p15, 11.2-p4 — fixed in 11.2

How to fix

Upgrade to a fixed version: FreeBSD 11.2. Check the vendor advisory for mitigations.

References

https://security.FreeBSD.org/advisories/FreeBSD-EN-18:11.listen.asc
https://www.flexera.com/company/secunia-research/advisories/SR-2018-21.html
https://security.FreeBSD.org/advisories/FreeBSD-EN-18:11.listen.asc
https://www.flexera.com/company/secunia-research/advisories/SR-2018-21.html

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