Listen to this Post
ImageMagick is a widely deployed open-source image processing library used for editing, converting, and manipulating digital images across countless applications and web services. The vulnerability exists within the MAT decoder component, which handles a specific image container format. On 32-bit systems, memory management is constrained by a limited address space, making heap-based overflows particularly dangerous because heap memory layout is more predictable and exploitation techniques are more effective.
The root cause is a missing check of a return value from a memory allocation operation inside the MAT decoder. When processing a specially crafted MAT file, the decoder executes a sequence that includes memory allocation followed by data copying. However, because the return value of the allocation is never validated, the decoder proceeds as if the allocation succeeded even when it fails or returns an undersized buffer. Subsequent write operations then attempt to copy data beyond the allocated heap boundaries, triggering a heap buffer over-write.
This flaw is specific to 32-bit architectures because the vulnerable code path relies on assumptions about pointer sizes and memory layout that break down on 64-bit systems. The patch, implemented in versions 6.9.13-48 and 7.1.2-24, introduces proper return value validation after SetQuantumFormat—only proceeding to `SetQuantumDepth` and `SetQuantumEndian` when the status is normal, while releasing resources and throwing an exception on failure.
Attackers can craft malicious MAT files and deliver them via web uploads, email attachments, or any vector where ImageMagick processes untrusted input. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow). It requires no authentication and no user interaction beyond the victim processing the image, with a CVSS v3.1 base score of 5.9 (Medium). The attack complexity is rated High due to the 32-bit constraint and the need to craft a precise exploit. While no public exploit has been documented, the potential for remote code execution makes this a critical concern for any 32-bit deployment.
DailyCVE Form:
Platform: 32-bit systems
Version: < 6.9.13-48
Vulnerability: Heap buffer over-write
Severity: Moderate (CVSS 5.9)
date: June 10, 2026
Prediction: July 2026
What Undercode Say:
Analytics indicate this vulnerability affects all ImageMagick versions prior to 6.9.13-48 and 7.1.2-24 on 32-bit platforms. The Debian security tracker lists multiple vulnerable releases including bullseye, bookworm, and trixie. The CVE was published on June 10, 2026, with the GitHub advisory reviewed and updated as recently as June 25, 2026. The EPSS score is not yet available, and the CVE is not in the KEV catalog, suggesting limited public exploitation to date. However, the underground exploit price is estimated between $0–$5k, indicating active interest.
To check your ImageMagick version:
identify -version
To verify if you are running a vulnerable 32-bit build:
file $(which convert) | grep 32-bit
To list all installed ImageMagick packages and their versions on Debian/Ubuntu:
dpkg -l | grep imagemagick
On RHEL/CentOS/Fedora:
rpm -qa | grep -i imagemagick
Exploit:
The exploitation vector is remote and requires no authentication. An attacker crafts a malicious MAT file with specific header and data fields designed to trigger the missing return-value check. When processed by the vulnerable MAT decoder on a 32-bit system, the decoder allocates a heap buffer using a routine such as malloc(). Because the return value is not checked, the decoder proceeds to write data into the buffer even if allocation failed or returned an undersized chunk. This overwrites adjacent heap metadata or application data, leading to memory corruption.
Successful exploitation can corrupt application state, cause crashes, or—if the corrupted memory is later used in a controlled way—enable arbitrary code execution. The attack requires user interaction (the victim must open or process the malicious MAT file). No public exploit code is currently available, but the vulnerability is considered easy to exploit once the specific memory layout is understood.
Protection:
- Upgrade ImageMagick to version 6.9.13-48 or 7.1.2-24 (or later) immediately.
- If the MAT format is not required, disable MAT decoding entirely through ImageMagick’s configuration or by removing the MAT decoder module.
- Validate or quarantine all image files before processing, ensuring only trusted sources can supply MAT content.
- For 32-bit systems that cannot be upgraded, consider migrating to 64-bit where the vulnerability does not manifest.
- Implement heap protection mechanisms and input validation layers as defense-in-depth.
- Monitor image upload endpoints and implement automated scanning for malicious file content.
Impact:
- Confidentiality: None (CVSS v3.1: N) – the vulnerability does not directly leak information.
- Integrity: None (CVSS v3.1: N) – data corruption is not a direct integrity breach.
- Availability: High (CVSS v3.1: H) – successful exploitation typically causes crashes and denial of service.
- Potential for Code Execution: If heap corruption is carefully controlled, an attacker may achieve arbitrary code execution, leading to full system compromise.
- Affected Environments: All 32-bit systems running vulnerable ImageMagick versions that process untrusted MAT files. This includes legacy embedded systems, IoT devices, and older server deployments.
- Attack Vector: Remote, network-based – attackers can deliver malicious MAT files via web uploads, email, or any file-sharing mechanism.
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
