polkit is a toolkit for managing policies related to unprivileged processes communicating with privileged process.
Flawed input validation of arguments was discovered in the 'pkexec' program's main() function.
A local attacker could achieve root privilege escalation.
Run the following command as root: # chmod 0755 /usr/bin/pkexec
Upgrade Polkit to a patched version.
# emerge --sync
# emerge --ask --verbose ">=sys-auth/polkit-0.120-r2"