CVE-2026-2044
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious PGM image files in GIMP. The flaw exists due to uninitialized memory access during PGM file parsing, enabling code execution in the context of the GIMP process. All GIMP users who open untrusted PGM files are affected.
💻 Affected Systems
- GIMP (GNU Image Manipulation Program)
📦 What is this software?
Gimp by Gimp
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the user running GIMP, potentially leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation or malware execution on the user's system, potentially leading to credential theft, data exfiltration, or lateral movement within the network.
If Mitigated
Limited impact with proper application sandboxing, where exploitation would be contained within the sandbox without affecting the host system.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file) but the vulnerability is in a widely used image format parser. ZDI has confirmed the vulnerability and exploitation is likely given the nature of memory corruption bugs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 112a5e038f0646eae5ae314988ec074433d2b365
Vendor Advisory: https://gitlab.gnome.org/GNOME/gimp/-/merge_requests/2569/diffs?commit_id=112a5e038f0646eae5ae314988ec074433d2b365
Restart Required: Yes
Instructions:
1. Update GIMP to the latest version from official sources. 2. On Linux, use your distribution's package manager (apt update && apt upgrade gimp for Debian/Ubuntu, yum update gimp for RHEL/CentOS). 3. On Windows/macOS, download the latest version from gimp.org. 4. Restart GIMP after updating.
🔧 Temporary Workarounds
Disable PGM file association
allRemove GIMP's ability to open PGM files by default
On Linux: update-mime-database ~/.local/share/mime
On Windows: Use 'Default Apps' settings to change PGM file association
Sandbox GIMP execution
allRun GIMP in a restricted environment using application sandboxing
On Linux: firejail gimp
On Windows: Use Windows Sandbox or similar virtualization
🧯 If You Can't Patch
- Implement strict file type filtering to block PGM files at network perimeter (email gateways, web proxies)
- Educate users to never open PGM files from untrusted sources and use alternative image viewers for PGM files
🔍 How to Verify
Check if Vulnerable:
Check GIMP version and compare against patched versions. Vulnerable if using version before commit 112a5e038f0646eae5ae314988ec074433d2b365Check Version:
gimp --versionVerify Fix Applied:
Verify GIMP version is updated and test opening known safe PGM files to ensure functionality is maintained📡 Detection & Monitoring
Log Indicators:
- GIMP crash logs with memory access violations
- Unexpected child processes spawned from GIMP
- Network connections initiated by GIMP process
Network Indicators:
- Downloads of PGM files from untrusted sources
- Unusual outbound connections from systems running GIMP
SIEM Query:
process_name:"gimp" AND (event_type:"crash" OR child_process_count > 1)