CVE-2024-56826
📋 TL;DR
A heap buffer overflow vulnerability exists in OpenJPEG's opj_decompress utility when specific options are used. This can cause application crashes or potentially allow arbitrary code execution. Users of OpenJPEG's decompression functionality are affected.
💻 Affected Systems
- OpenJPEG
- Software using OpenJPEG library
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if combined with other vulnerabilities or misconfigurations.
Likely Case
Application crash (denial of service) when processing malicious JPEG2000 files with specific options.
If Mitigated
Limited to application crash with proper sandboxing and privilege separation.
🎯 Exploit Status
Exploitation requires user interaction with malicious JPEG2000 files and specific command-line options. No public exploit code identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit e492644fbded4c820ca55b5e50e598d346e850e8 or later
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2024-56826
Restart Required: No
Instructions:
1. Update OpenJPEG to version containing commit e492644fbded4c820ca55b5e50e598d346e850e8. 2. Recompile any applications using OpenJPEG library. 3. Replace existing opj_decompress binary with patched version.
🔧 Temporary Workarounds
Restrict opj_decompress usage
linuxLimit use of opj_decompress utility to trusted users and restrict command-line options.
chmod 750 /usr/bin/opj_decompress
setfacl -m u:trusteduser:rx /usr/bin/opj_decompress
Disable vulnerable options
allAvoid using the specific command-line options that trigger the vulnerability.
🧯 If You Can't Patch
- Implement strict input validation for JPEG2000 files processed by opj_decompress
- Run opj_decompress in sandboxed/containerized environments with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check OpenJPEG version: opj_decompress -v | grep version. If version predates commit e492644fbded4c820ca55b5e50e598d346e850e8, system is vulnerable.Check Version:
opj_decompress -v 2>&1 | grep -i versionVerify Fix Applied:
Verify OpenJPEG version includes commit e492644fbded4c820ca55b5e50e598d346e850e8: git log --oneline | grep e492644📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from opj_decompress
- Abnormal termination of image processing applications
Network Indicators:
- Unusual file transfers of JPEG2000 files followed by process crashes
SIEM Query:
process_name:"opj_decompress" AND (event_type:"crash" OR exit_code:139)🔗 References
- https://access.redhat.com/errata/RHSA-2025:7309
- https://access.redhat.com/security/cve/CVE-2024-56826
- https://bugzilla.redhat.com/show_bug.cgi?id=2335172
- https://github.com/uclouvain/openjpeg/commit/e492644fbded4c820ca55b5e50e598d346e850e8
- https://github.com/uclouvain/openjpeg/issues/1563
- https://lists.debian.org/debian-lts-announce/2025/04/msg00002.html
