---
id: CVE-2023-39329
title: A flaw was found in OpenJPEG
summary: >-
  A flaw was found in OpenJPEG. A resource exhaustion can occur in the
  opj_t1_decode_cblks function in tcd.c through a crafted image file, causing a
  denial of service.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
vendor: uclouvain
product: openjpeg
affected:
  - openjpeg = 2.0
  - openjpeg
  - openjpeg = 2.5.0
published: '2024-07-13'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T18:17:03.447'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-39329'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:4128'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-39329'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2295816'
    label: secalert@redhat.com
  - url: 'https://github.com/uclouvain/openjpeg/issues/1474'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-39329'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2295816'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-39329.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2023-39329'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-39329'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00588
epssPercentile: 0.45829
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-07-13T20:14:44.693644Z'
ingestedAt: '2026-09-21T17:49:53.183Z'
patched:
  - ai_inference_server 3.2
---

## Overview

A flaw was found in OpenJPEG. A resource exhaustion can occur in the opj_t1_decode_cblks function in tcd.c through a crafted image file, causing a denial of service.

## Affected

- `openjpeg = 2.0`
- `openjpeg`
- `openjpeg = 2.5.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:4128** · Red Hat · fixed in: Red Hat AI Inference Server 3.2 · released 2026-03-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:4128)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-39329.json)