Gentoo Linux Security Advisory GLSA 200603-21 – ISS discovered that Sendmail is vulnerable to a race condition in the handling of asynchronous signals. Versions less than 8.13.6 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/44884/glsa-200603-21.txt
Source: https://packetstormsecurity.com/files/44884/Gentoo-Linux-Security-Advisory-200603-21.html