CVE-2025-20787 is a use-after-free vulnerability categorized under CWE-416 found in the display subsystem of numerous MediaTek System-on-Chips (SoCs), including MT2718, MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT8196, MT8676, MT8678, and MT8796. These chipsets are integrated into a broad range of Android devices running versions 14.0 through 16.0. The vulnerability arises from improper handling of memory in the display driver, leading to use-after-free conditions that cause memory corruption. This flaw can be exploited by an attacker who already possesses System-level privileges on the device to escalate their privileges further, potentially gaining higher control over the system. The attack vector is local, requiring no user interaction, but it does require the attacker to have already compromised the system to some extent. The CVSS v3.1 base score is 6.7, reflecting a medium severity with high impact on confidentiality, integrity, and availability due to the potential for privilege escalation and system compromise. No public exploits have been reported yet, but the vulnerability is significant given the widespread deployment of affected MediaTek SoCs in consumer and enterprise mobile devices. The issue has been assigned Patch ID ALPS10149879 and Issue ID MSV-4658 by MediaTek, though no direct patch links are currently provided. The vulnerability was published on January 6, 2026, with the initial reservation date on November 1, 2024.

The primary impact of CVE-2025-20787 is local privilege escalation on devices using affected MediaTek chipsets. An attacker who has already gained System-level access can exploit this vulnerability to elevate privileges further, potentially gaining root or kernel-level control. This can lead to complete device compromise, allowing unauthorized access to sensitive data, modification of system files, installation of persistent malware, or disruption of device functionality. Given the vulnerability affects the display driver, exploitation could also impact device stability and availability, causing crashes or denial of service. The widespread use of MediaTek SoCs in smartphones, tablets, and IoT devices means that a large number of devices globally are at risk. Enterprises relying on mobile devices for sensitive operations could face increased risk of data breaches and operational disruption. The lack of required user interaction lowers the barrier for exploitation once system privileges are obtained, increasing the threat level in environments where devices may be physically or logically compromised.

To mitigate CVE-2025-20787, organizations and users should prioritize applying official patches from MediaTek or device manufacturers as soon as they become available. Until patches are deployed, restricting access to devices and limiting the ability of users or applications to gain System-level privileges can reduce exploitation risk. Employing strong endpoint security controls, such as application whitelisting, behavior monitoring, and privilege management, can help prevent initial compromise that leads to System privilege acquisition. Regularly updating device firmware and operating systems to the latest versions is critical. For enterprises, implementing mobile device management (MDM) solutions to enforce security policies and monitor device integrity can further reduce exposure. Additionally, security teams should monitor for unusual local privilege escalation attempts and audit device logs for signs of exploitation. Vendors should provide clear patching guidance and update mechanisms to ensure timely remediation.