CVE-2021-21851

Multiple exploitable integer overflow vulnerabilities exist within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input at “csgp” decoder sample group description indices can cause an integer overflow due to unchecked arithmetic 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.

• CWE-680
• CWE-190

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297Exploit, Technical Description, Third Party Advisory
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1297Exploit, Technical Description, Third Party Advisory
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297Exploit, Technical Description, Third Party Advisory
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1297Exploit, Technical Description, Third Party Advisory

Published

Aug 18, 2021

Last Modified

Jun 17, 2026

Status

Modified

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