CVE Database›Document archive›CVE-2020-27823

CVE-2020-27823

openjpeg: heap-buffer-overflow write in opj_tcd_dc_level_shift_encode()

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Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · November 25, 2020

Updated · June 27, 2026

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.

Statement

Red Hat Product Security has rated this flaw with Moderate severity because it affects the encoder functionality specifically when performing an image conversion and not general reading of image files.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

This flaw can be mitigated by not using openjpeg to convert untrusted image files.

CVSS / CWE

CVSS 3.1 · 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-787 · Out-of-bounds Write