Gentoo Linux Security Advisory GLSA 200506-22 – The sudoers file is used to define the actions sudo users are permitted to perform. Charles Morris discovered that a specific layout of the sudoers file could cause the results of an internal check to be clobbered, leaving sudo vulnerable to a race condition. Versions less than 1.6.8_p9 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/38265/glsa-200506-22.txt
Source: https://packetstormsecurity.com/files/38265/Gentoo-Linux-Security-Advisory-200506-22.html