CVE-2021-21861: Debian Linux
High severity, CVSS 8.8. EPSS: 1.6% chance of exploitation in the next 30 days.
An exploitable integer truncation vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. When processing the 'hdlr' FOURCC code, a specially crafted MPEG-4 input can cause an improper memory allocation resulting in a heap-based buffer overflow that causes memory corruption. An attacker can convince a user to open a video to trigger this vulnerability.
Affected products
Published 2021-08-16. Last modified 2026-06-17.