Gentoo Linux Security Advisory GLSA 200710-18 – Ludwig Nussel discovered that the check_special_mountprog() and check_special_umountprog() functions call setuid() and setgid() in the wrong order and do not check the return values, which can lead to privileges being dropped improperly. Versions less than 2.12r-r8 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60206/glsa-200710-18.txt
Source: https://packetstormsecurity.com/files/60206/Gentoo-Linux-Security-Advisory-200710-18.html