Freedesktop Polkit vulnerabilities

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Published CVEs affecting Freedesktop Polkit: 2 record(s), with affected versions and fixes.
cpe:2.3:a:freedesktop:polkit

CVE-2026-4897 Medium · 5.5 CWE-770 Mar 26, 2026

Polkit: polkit: denial of service via unbounded input processing through standard input

A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

CVE-2016-2568 High · 7.8 CWE-116 Feb 13, 2017

Improper Encoding or Escaping of Output in Freedesktop Polkit

pkexec, when used with --user nonpriv, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.