The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-04:13.linux.asc

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-04:13.linux.asc

FreeBSD is binary-compatible with the Linux operating system through a loadable kernel module/optional kernel component. A programming error in the handling of some Linux system calls may result in memory locations being accessed without proper validation.