CVE-2018-17155: Freebsd

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

In FreeBSD before 11.2-STABLE(r338983), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338984), and 10.4-RELEASE-p13, due to insufficient initialization of memory copied to userland in the getcontext and swapcontext system calls, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts privileged kernel data.

Affected products

• Freebsd Freebsd: before 11.2 (fixed in 11.2); version 10.4 only; version 11.1 only; version 11.2 only

Published 2018-09-28. Last modified 2026-06-17.