sys-boot/
syslinux

SYSLINUX, PXELINUX, ISOLINUX, EXTLINUX and MEMDISK bootloaders

https://www.syslinux.org/

There are no open security bugs.

You think something is missing here?
Start with filling a new security bug.

Please file new vulnerability reports on Gentoo Bugzilla and assign them to the Gentoo Security product and Vulnerabilities component.