Ubuntu Security Notice 5971-1 – It was discovered that graphviz contains null pointer dereference vulnerabilities. Exploitation via a specially crafted input file can cause a denial of service. This issue only affected Ubuntu 18.04 LTS. It was discovered that graphviz contains null pointer dereference vulnerabilities. Exploitation via a specially crafted input file can cause a denial of service. These issues only affected Ubuntu 14.04 ESM and Ubuntu 18.04 LTS. Vulnerability Files ≈ Packet Storm