What’s Vulnerable › Vulnerabilities

CVE-2020-27823

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-13 · updated 2026-06-17
• Weakness: CWE-20

Description

A flaw was found in OpenJPEG’s encoder. This flaw allows an attacker to pass specially crafted x,y offset input to OpenJPEG to use during encoding. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected products

• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 32, 33
• uclouvain openjpeg: before 2.4.0 — fixed in 2.4.0

How to fix

Upgrade to a fixed version: uclouvain openjpeg 2.4.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1905762
• https://lists.debian.org/debian-lts-announce/2021/02/msg00011.html
• 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-4882
• https://bugzilla.redhat.com/show_bug.cgi?id=1905762
• https://lists.debian.org/debian-lts-announce/2021/02/msg00011.html
• 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-4882

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