CVE-2020-27844

Name: CVE-2020-27844
Creator: NVD / NIST
Published: 2021-01-05T18:15:14.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2020-27844 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A flaw was found in openjpeg's src/lib/openjp2/t2.c in versions prior to 2.4.0. This flaw allows an attacker to provide crafted input to openjpeg during conversion and encoding, causing an out-of-bounds write. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

A flaw was found in openjpeg's src/lib/openjp2/t2.c in versions prior to 2.4.0. This flaw allows an attacker to provide crafted input to openjpeg during conversion and encoding, causing an out-of-bounds write. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Uclouvain	Openjpeg	< 2.4.0
Debian	Debian Linux	9.0
Oracle	Outside In Technology	8.5.5

References

https://bugzilla.redhat.com/show_bug.cgi?id=1907521Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202101-29Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1907521Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202101-29Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory

Timeline

Published: Jan 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27844?

How severe is CVE-2020-27844?

CVE-2020-27844 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27844?

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-2020-27844?

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

Scan your code now

Source: NVD / NIST