CVE-2025-20801 is a race condition vulnerability classified under CWE-362, found in the seninf module of several MediaTek SoCs (MT6878, MT6897, MT6899, MT6985, MT6989, MT6991, MT6993, MT8792, MT8796, MT8798) commonly used in Android devices running versions 13 through 16. The vulnerability arises due to improper synchronization when accessing shared resources, leading to potential memory corruption. This flaw can be exploited locally by an attacker who already possesses system-level privileges to escalate their privileges further, potentially gaining higher control over the device. The attack does not require user interaction, increasing the risk of automated or stealthy exploitation. The CVSS v3.1 score is 7.0, indicating high severity, with attack vector local, attack complexity high, privileges required low, no user interaction, and high impact on confidentiality, integrity, and availability. Although no public exploits are known, the vulnerability poses a significant risk to devices using affected MediaTek chipsets. The patch is identified as ALPS10251210, but no direct links are provided. The issue was reserved in November 2024 and published in January 2026.

The primary impact of CVE-2025-20801 is local privilege escalation on devices using affected MediaTek chipsets, which can lead to full compromise of the device's confidentiality, integrity, and availability. Attackers with existing system privileges can exploit this race condition to gain higher privileges, potentially bypassing security controls and executing arbitrary code with elevated rights. This could allow installation of persistent malware, unauthorized data access, or disruption of device functionality. Given the widespread use of MediaTek chipsets in many Android smartphones and IoT devices, the vulnerability could affect a large user base globally. Enterprises relying on mobile devices with these chipsets may face increased risk of targeted attacks, especially in environments where local access is possible. The lack of user interaction requirement facilitates stealthy exploitation, increasing the threat to sensitive environments.

To mitigate CVE-2025-20801, organizations and device manufacturers should prioritize applying the official patch ALPS10251210 as soon as it becomes available. Until patches are deployed, restrict local access to devices, enforce strict privilege separation, and monitor for unusual local activity indicative of exploitation attempts. Employ runtime protections such as memory corruption mitigations (e.g., ASLR, DEP) and use security frameworks that limit the impact of privilege escalation. Device administrators should disable or limit unnecessary system-level privileges for applications and users. Regularly update device firmware and operating systems to incorporate security fixes. For enterprises, implement mobile device management (MDM) solutions to enforce security policies and monitor device integrity. Additionally, vendors should review synchronization mechanisms in the seninf component to prevent similar race conditions in future releases.