CVE-2023-5978: Freebsd

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

In versions of FreeBSD 13-RELEASE before 13-RELEASE-p5, under certain circumstances the cap_net libcasper(3) service incorrectly validates that updated constraints are strictly subsets of the active constraints.  When only a list of resolvable domain names was specified without setting any other limitations, an application could submit a new list of domains including include entries not previously listed.  This could permit the application to resolve domain names that were previously restricted.

Affected products

• Freebsd Freebsd: from 13.0, before 13.2 (fixed in 13.2); version 13.2 only

Published 2023-11-08. Last modified 2026-06-17.