CVE-2020-27845

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-05 · updated 2026-06-17
Weakness: CWE-125

Description

There's a flaw in src/lib/openjp2/pi.c of openjpeg in versions prior to 2.4.0. If an attacker is able to provide untrusted input to openjpeg's conversion/encoding functionality, they could cause an out-of-bounds read. The highest impact of this flaw is to application availability.

Affected products

Debian Linux: 9.0, 10.0
Fedoraproject Fedora: 32
Oracle Corporation Outside In Technology: 8.5.5
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=1907523
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
https://security.gentoo.org/glsa/202101-29
https://www.debian.org/security/2021/dsa-4882
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.oracle.com/security-alerts/cpuApr2021.html
https://bugzilla.redhat.com/show_bug.cgi?id=1907523
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
https://security.gentoo.org/glsa/202101-29
https://www.debian.org/security/2021/dsa-4882

Get alerted when CVE-2020-27845 or the next vulnerability affects your stack