Gentoo Linux Security Advisory 201704-1 – Multiple vulnerabilities have been found in QEMU, the worst of which could the worst of which could lead to arbitrary code execution, or cause a Denial of Service condition. Versions less than 2.8.0-r9 are affected.

Gentoo Linux Security Advisory 201704-2 – Multiple vulnerabilities have been found in the Chromium web browser, the worst of which allows remote attackers to execute arbitrary code. Versions less than 57.0.2987.133 are affected.

Gentoo Linux Security Advisory 201704-3 – Multiple vulnerabilities have been found in X.Org server and libraries, the worse of which allowing local attackers to execute arbitrary code. Versions less than 1.19.2 are affected.

Ubuntu Security Notice 3258-1 – It was discovered that Dovecot incorrectly handled some usernames. An attacker could possibly use this issue to cause Dovecot to hang or crash, resulting in a denial of service.

Ubuntu Security Notice 3257-1 – A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Slackware Security Advisory – New libtiff packages are available for Slackware 14.2 and -current to fix security issues.