CVE-2020-27824

Name: CVE-2020-27824
Creator: NVD / NIST
Published: 2021-05-13T14:15:17.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.61%

Last modified Jun 17, 2026

CVE-2020-27824 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A flaw was found in OpenJPEG’s encoder in the opj_dwt_calc_explicit_stepsizes() function. This flaw allows an attacker who can supply crafted input to decomposition levels to cause a buffer overflow. EPSS estimates a 1.61% chance of exploitation in the next 30 days.

Description

A flaw was found in OpenJPEG’s encoder in the opj_dwt_calc_explicit_stepsizes() function. This flaw allows an attacker who can supply crafted input to decomposition levels to cause a buffer overflow. The highest threat from this vulnerability is to system availability.

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

1.61%

72.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Uclouvain	Openjpeg	< 2.4.0
Redhat	Enterprise Linux	8.0
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1905723Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQR4EWRFFZQDMFPZKFZ6I3USLMW6TKTP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
https://www.debian.org/security/2021/dsa-4882Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1905723Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQR4EWRFFZQDMFPZKFZ6I3USLMW6TKTP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
https://www.debian.org/security/2021/dsa-4882Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Timeline

Published: May 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27824?

How severe is CVE-2020-27824?

CVE-2020-27824 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.61% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27824?

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-2020-27824?

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

Scan your code now

Source: NVD / NIST