Security updates for Tuesday
Arch Linux has updated optipng (code execution).
Debian has updated mercurial (three vulnerabilities) and roundcube (code execution).
Fedora has updated krb5 (F22: null pointer dereference) and vtun (F23; F22: denial of service).
Gentoo has updated xen (multiplevulnerabilities, some from 2012).
openSUSE has updated ghostscript(Leap42.1: buffer overflow).
Red Hat has updated nss, nss-util,nspr (RHEL6: two vulnerabilities).
Slackware has updated thunderbird (multiple vulnerabilities).
SUSE has updated xen (SLE11-SP4:multiple vulnerabilities, some from 2013).
Ubuntu has updated libav (12.04: multiple vulnerabilities) and xchat-gnome (man-in-the-middle attack).