What is CVE-2021-40571?

CVE-2021-40571 is a high-severity vulnerability in Gpac, classified under Double Free. CVSS score: 7.8/10. Published 2022-01-13.

How severe is CVE-2021-40571?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2021-40571 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Double Free in Gpac

CVE-2021-40571

The binary MP4Box in Gpac 1.0.1 has a double-free vulnerability in the ilst_box_read function in box_code_apple.c, which allows attackers to cause a denial of service, even code execution and escalation of privileges.

Vulnerability class: Double Free

Published 2022-01-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Gpac — versions 1.0.1

Weakness classification (CWE)

CWE-415 — Double Free

Public proof-of-concept exploits

s-cube-xmu/Bug_

References

github.com/gpac/gpac/issues/1895 (Exploit, Third Party Advisory, Issue Tracking)
github.com/gpac/gpac/commit/a69b567b8c95c72f9560c873c5ab348be058f340 (Patch, Third Party Advisory)
www.debian.org/security/2023/dsa-5411 (vendor-advisory)

Frequently asked questions

What is CVE-2021-40571?: CVE-2021-40571 is a high-severity vulnerability in Gpac, classified under Double Free. CVSS score: 7.8/10. Published 2022-01-13.
How severe is CVE-2021-40571?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-40571 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.