CVE-2021-40563

Name: CVE-2021-40563
Creator: NVD / NIST
Published: 2022-01-12T22:15:07.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-40563 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A Segmentation fault exists casued by null pointer dereference exists in Gpac through 1.0.1 via the naludmx_create_avc_decoder_config function in reframe_nalu.c when using mp4box, which causes a denial of service.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

A Segmentation fault exists casued by null pointer dereference exists in Gpac through 1.0.1 via the naludmx_create_avc_decoder_config function in reframe_nalu.c when using mp4box, which causes a denial of service.

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

0.85%

53.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Gpac	Gpac	<= 1.0.1

References

https://github.com/gpac/gpac/commit/5ce0c906ed8599d218036b18b78e8126a496f137Patch, Third Party Advisory
https://github.com/gpac/gpac/issues/1892Third Party Advisory
https://www.debian.org/security/2023/dsa-5411
https://github.com/gpac/gpac/commit/5ce0c906ed8599d218036b18b78e8126a496f137Patch, Third Party Advisory
https://github.com/gpac/gpac/issues/1892Third Party Advisory
https://www.debian.org/security/2023/dsa-5411

Timeline

Published: Jan 12, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40563?

How severe is CVE-2021-40563?

CVE-2021-40563 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40563?

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-2021-40563?

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

Scan your code now

Source: NVD / NIST