CVE-2021-29628: Freebsd

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

In FreeBSD 13.0-STABLE before n245764-876ffe28796c, 12.2-STABLE before r369857, 13.0-RELEASE before p1, and 12.2-RELEASE before p7, a system call triggering a fault could cause SMAP protections to be disabled for the duration of the system call. This weakness could be combined with other kernel bugs to craft an exploit.

Affected products

• Freebsd Freebsd: version 12.2 only; version 13.0 only

Published 2021-05-28. Last modified 2026-06-17.