Freedesktop » Policykit : Security Vulnerabilities, CVEs,

Format string vulnerability in the grant helper (polkit-grant-helper.c) in PolicyKit 0.7 and earlier allows attackers to cause a denial of service (crash) and possibly execute arbitrary code via format strings in a password.

pkexec.c in pkexec in libpolkit in PolicyKit 0.96 allows local users to determine the existence of arbitrary files via the argument.