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Vulnerability record · CVE-2020-27842 · published 5 January 2021

CVE-2020-27842: Uclouvain openjpeg out-of-bounds read vulnerability

UUclouvain · Openjpeg

There's a flaw in openjpeg's t2 encoder in versions prior to 2.4.0. An attacker who is able to provide crafted input to be processed by openjpeg could cause a null pointer dereference. The highest impact of this flaw is to application availability.

5.5 CVSS 3.1 Medium EPSS 1.5% · top 26.7% CWE-125 · Out-of-bounds read
5.5CVSS 3.1 base score, v2 4.3
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

There's a flaw in openjpeg's t2 encoder in versions prior to 2.4.0. An attacker who is able to provide crafted input to be processed by openjpeg could cause a null pointer dereference. The highest impact of this flaw is to application availability.

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

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1907513 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00006.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCX
https://security.gentoo.org/glsa/202101-29 Third Party Advisory
https://www.debian.org/security/2021/dsa-4882 Mailing ListThird Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html PatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1907513 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00006.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCX
https://security.gentoo.org/glsa/202101-29 Third Party Advisory
https://www.debian.org/security/2021/dsa-4882 Mailing ListThird Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-27842), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.