CVE-2021-21850 Integer overflow in GPAC Project

What is CVE-2021-21850?

CVE-2021-21850 is a high-severity vulnerability in Debian Debian Linux, published on 25 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input can cause an integer overflow when the library encounters an atom using the “trun” FOURCC code 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.

Weakness: CWE-190, CWE-680

Which versions are affected by CVE-2021-21850?

It affects 2 products.

Products include Debian Debian Linux, Gpac Gpac.

How do I fix CVE-2021-21850?

Upgrade to a fixed version.

Is CVE-2021-21850 being exploited?

There is no known exploitation of CVE-2021-21850 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-21850, GHSA-hvp5-54cx-25q6, UBUNTU-CVE-2021-21850.