Gentoo Linux Security Advisory GLSA 200903-24 – An insecure temporary file usage in Shadow may allow local users to gain root privileges. Paul Szabo reported a race condition in the login executable when setting up tty permissions. Versions less than 4.1.2.2 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75626/glsa-200903-24.txt
Source: https://packetstormsecurity.com/files/75626/Gentoo-Linux-Security-Advisory-200903-24.html