CVE-2025-20775 is a use-after-free vulnerability (CWE-416) identified in the display subsystem of multiple MediaTek chipsets, including MT6739, MT6761, MT6765, MT6768, and many others spanning a broad range of models. The flaw arises from improper memory management where a freed memory region is accessed again, leading to memory corruption. This can be exploited by an attacker who already possesses System-level privileges to escalate their privileges further, potentially gaining higher control over the device. The vulnerability does not require user interaction, making it more dangerous in scenarios where an attacker has already compromised the system. Affected devices run Android versions 14.0, 15.0, and 16.0. The CVSS v3.1 score is 6.7 (medium), with vector AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, indicating local attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. No public exploits are known yet, but the vulnerability's presence in widely deployed MediaTek SoCs makes it a significant concern. The issue is tracked under MediaTek's internal ID MSV-4795 and patch ID ALPS10182914, though no public patch links are currently available.

The vulnerability allows an attacker with existing System privileges to escalate their access, potentially gaining full control over the affected device. This can lead to unauthorized access to sensitive data, modification or deletion of critical system files, and disruption of device functionality. Since the flaw affects the display subsystem, it could also be leveraged to bypass security controls or compromise user interface integrity. The broad range of affected MediaTek chipsets means millions of Android devices globally could be at risk, especially those running Android 14 to 16. Organizations relying on these devices for sensitive communications or operations may face increased risk of data breaches, espionage, or sabotage. The lack of required user interaction lowers the barrier for exploitation once system privileges are obtained, increasing the threat level in environments where initial compromise is possible.

Organizations and users should monitor MediaTek and device manufacturers for official patches addressing CVE-2025-20775 and apply them promptly. Until patches are available, restricting access to devices to trusted users and minimizing the number of applications or processes with System privileges can reduce exploitation risk. Employing runtime protection mechanisms such as memory protection and integrity checks may help detect or prevent exploitation attempts. Security teams should audit devices for signs of privilege escalation or unusual behavior in the display subsystem. For enterprises, enforcing strict device management policies, including limiting installation of untrusted apps and using mobile threat defense solutions, can mitigate risk. Collaboration with device vendors to accelerate patch deployment is critical given the widespread impact.