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High severity8.8OSV Advisory· Published Aug 25, 2021· Updated Jun 17, 2026

CVE-2021-21840

CVE-2021-21840

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 used to process an atom using the “saio” FOURCC code 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.

AI Insight

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Affected products

5
  • Gpac/GpacOSV2 versions
    v0.5.2, v0.6.0, v0.7.0, …+ 1 more
    • (no CPE)range: v0.5.2, v0.6.0, v0.7.0, …
    • cpe:2.3:a:gpac:gpac:1.0.1:*:*:*:*:*:*:*
  • GPAC Project On Advanced Content/GPACllm-fuzzy
    Range: =1.0.1
  • Debian/linux2 versions
    cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
    • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

2

News mentions

0

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