CVE-2023-39328Public exploit

Local denial of service via unchecked allocations

Published Jul 9, 2024 · Updated Jun 26, 2026

Resource exhaustion in OpenJPEG 2.5.0 allows local users to crash opj_decompress by opening a crafted JPEG 2000 file. The decoder repeatedly calls opj_calloc for roughly 2 GB blocks without enforcing a cumulative memory limit after parser checks accept the file. A user or application must submit the file for local decoding; memory exhaustion terminates the process and can pressure the host.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in OpenJPEG 2.5.0 allows local users to crash opj_decompress by opening a crafted JPEG 2000 file. The decoder repeatedly calls opj_calloc for roughly 2 GB blocks without enforcing a cumulative memory limit after parser checks accept the file. A user or application must submit the file for local decoding; memory exhaustion terminates the process and can pressure the host.

The record

CVE
CVE-2023-39328
Published
Jul 9, 2024
Updated
Jun 26, 2026
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
CWE-400, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Université catholique de Louvain · OpenJPEGversion=2.5.0

Published CVSS scores

5.5Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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