CVE-2021-30020

Name: CVE-2021-30020
Creator: NVD / NIST
Published: 2021-04-19T20:15:14.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.91%

Last modified Jun 17, 2026

CVE-2021-30020 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In the function gf_hevc_read_pps_bs_internal function in media_tools/av_parsers.c in GPAC 1.0.1 there is a loop, which with crafted file, pps->num_tile_columns may be larger than sizeof(pps->column_width), which results in a heap overflow in the loop.. EPSS estimates a 0.91% chance of exploitation in the next 30 days.

Description

In the function gf_hevc_read_pps_bs_internal function in media_tools/av_parsers.c in GPAC 1.0.1 there is a loop, which with crafted file, pps->num_tile_columns may be larger than sizeof(pps->column_width), which results in a heap overflow in the loop.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.91%

55.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Gpac	Gpac	1.0.1

References

https://github.com/gpac/gpac/commit/51cdb67ff7c5f1242ac58c5aa603ceaf1793b788Patch, Third Party Advisory
https://github.com/gpac/gpac/issues/1722Exploit, Third Party Advisory
https://github.com/gpac/gpac/commit/51cdb67ff7c5f1242ac58c5aa603ceaf1793b788Patch, Third Party Advisory
https://github.com/gpac/gpac/issues/1722Exploit, Third Party Advisory

Timeline

Published: Apr 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30020?

How severe is CVE-2021-30020?

CVE-2021-30020 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.91% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30020?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30020?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST