CVE-2021-21848
mediumpriority · track · 36EPSS 0.017 · 77 %ileEURUUSEPSS · scored 2026-10-27
An exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The library will actually reuse the parser for atoms with the “stsz” FOURCC code when parsing atoms that use the “stz2” FOURCC code and 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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
- n/a GPAC Project≤ GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304,GPAC Project Advanced Content v1.0.1enisa_euvdEU
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297cnnvd
- https://vigilance.fr/vulnerability/GPAC-multiple-vulnerabilities-36279cnnvd
- https://www.auscert.org.au/bulletins/ESB-2021.2938cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021081704cnnvd
- https://www.debian.org/security/2021/dsa-4966cnnvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297enisa_euvd
- https://www.debian.org/security/2021/dsa-4966enisa_euvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297ExploitThird Party Advisorynvd
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