CVE-2018-17156: Freebsd

Medium severity, CVSS 5.9. EPSS: 1.6% chance of exploitation in the next 30 days.

In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwrite could occur when constructing an ICMP reply packet when using a non-standard value for the net.inet.icmp.quotelen sysctl.

Affected products

• Freebsd Freebsd: before 11.2 (fixed in 11.2); version 11.2 only

Published 2018-11-28. Last modified 2026-06-17.