CVE-2020-11558

Name: CVE-2020-11558
Creator: NVD / NIST
Published: 2020-04-05T20:15:12.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.54%

Last modified Jun 17, 2026

CVE-2020-11558 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in libgpac.a in GPAC 0.8.0, as demonstrated by MP4Box. audio_sample_entry_Read in isomedia/box_code_base.c does not properly decide when to make gf_isom_box_del calls. EPSS estimates a 1.54% chance of exploitation in the next 30 days.

Description

An issue was discovered in libgpac.a in GPAC 0.8.0, as demonstrated by MP4Box. audio_sample_entry_Read in isomedia/box_code_base.c does not properly decide when to make gf_isom_box_del calls. This leads to various use-after-free outcomes involving mdia_Read, gf_isom_delete_movie, and gf_isom_parse_movie_boxes.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.54%

71.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Gpac	Gpac	0.8.0

References

https://github.com/gpac/gpac/commit/6063b1a011c3f80cee25daade18154e15e4c058cPatch, Third Party Advisory
https://github.com/gpac/gpac/issues/1440Exploit, Third Party Advisory
https://github.com/gpac/gpac/commit/6063b1a011c3f80cee25daade18154e15e4c058cPatch, Third Party Advisory
https://github.com/gpac/gpac/issues/1440Exploit, Third Party Advisory

Timeline

Published: Apr 5, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11558?

How severe is CVE-2020-11558?

CVE-2020-11558 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11558?

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-2020-11558?

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

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Source: NVD / NIST