CVE-2026-20439 in MT2718
Summary
by MITRE • 03/02/2026
In imgsys, there is a possible system crash due to use after free. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10431955; Issue ID: MSV-5826.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 03/04/2026
The vulnerability identified as CVE-2026-20439 represents a critical use after free condition within the imgsys component of a system architecture. This flaw occurs when memory that has been freed is subsequently accessed by the imgsys module, creating a scenario where the system may experience unexpected behavior or complete failure. The vulnerability is particularly concerning because it can result in system crashes and local denial of service conditions, making it a significant threat to system stability and availability. The issue manifests specifically within the imgsys subsystem, which likely handles image processing or system graphics functions, though the exact scope of the component's functionality requires further analysis.
The technical nature of this vulnerability places it squarely within the CWE-416 category of use after free conditions, which is a well-documented weakness in memory management that has been extensively analyzed by security researchers and standards organizations. This particular implementation flaw allows for potential exploitation through memory corruption techniques that can cause the system to behave unpredictably when attempting to access freed memory locations. The vulnerability's classification as a local denial of service means that while it requires existing system privileges for exploitation, the impact can be severe enough to render the affected system unusable. The absence of user interaction requirements makes this vulnerability particularly dangerous as it can be exploited automatically without any need for social engineering or additional attack vectors.
From an operational perspective, the impact of CVE-2026-20439 extends beyond simple system crashes to potentially compromise the entire system availability and integrity. When a malicious actor already possesses system privileges, they can leverage this vulnerability to cause persistent denial of service conditions that may require system reboot or manual intervention to resolve. The imgsys component's role in system graphics or image processing functions means that exploitation could affect not only core system operations but also user-facing applications that depend on these services. The vulnerability's potential for causing cascading failures makes it particularly dangerous in environments where system stability is paramount, such as enterprise servers, embedded systems, or critical infrastructure platforms.
The mitigation strategy for this vulnerability should focus on implementing the provided patch ALPS10431955 which addresses the specific use after free condition in the imgsys module. Security administrators should prioritize deployment of this patch across all affected systems, particularly those running the imgsys component. Additionally, system monitoring should be enhanced to detect unusual memory access patterns or system stability issues that might indicate exploitation attempts. The vulnerability's classification under MSV-5826 indicates it has been properly documented and tracked within the organization's vulnerability management system, suggesting that proper incident response procedures should be in place. Organizations should also consider implementing memory safety checks and runtime protections to prevent similar issues from occurring in other system components, aligning with best practices for secure coding and memory management that are recommended by industry standards such as those outlined in the CWE database and security frameworks like MITRE ATT&CK.