CVE-2021-31256

Name: CVE-2021-31256
Creator: NVD / NIST
Published: 2021-04-19T19:15:18.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2021-31256 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Memory leak in the stbl_GetSampleInfos function in MP4Box in GPAC 1.0.1 allows attackers to read memory via a crafted file.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

Memory leak in the stbl_GetSampleInfos function in MP4Box in GPAC 1.0.1 allows attackers to read memory via a crafted file.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.06%

60.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions
Gpac	Gpac	1.0.1

References

https://github.com/gpac/gpac/commit/2da2f68bffd51d89b1d272d22aa8cc023c1c066ePatch, Third Party Advisory
https://github.com/gpac/gpac/issues/1705Exploit, Third Party Advisory
https://github.com/gpac/gpac/commit/2da2f68bffd51d89b1d272d22aa8cc023c1c066ePatch, Third Party Advisory
https://github.com/gpac/gpac/issues/1705Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-31256?

Memory leak in the stbl_GetSampleInfos function in MP4Box in GPAC 1.0.1 allows attackers to read memory via a crafted file.

How severe is CVE-2021-31256?

CVE-2021-31256 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31256?

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-2021-31256?

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

Scan your code now

Source: NVD / NIST