CVE-2025-20767

7.8

MediaTek · 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, MT8792, MT8793

An out of bounds write vulnerability exists in the display component due to an integer overflow, potentially allowing for local privilege escalation.

Executive summary

A critical out of bounds write vulnerability in MediaTek display drivers could allow a local attacker to achieve privilege escalation on affected Android devices.

Vulnerability

The flaw is an out of bounds write (CWE-787) triggered by an integer overflow in the display component. Exploitation requires the attacker to already hold System-level privileges, though no user interaction is required once that initial threshold is met.

Business impact

Successful exploitation leads to local privilege escalation, allowing an attacker to bypass security boundaries within the Android operating system. With a CVSS score of 7.8, this vulnerability poses a significant risk to data confidentiality, integrity, and system availability, as it enables an attacker to gain elevated control over the device hardware and software stack.

Remediation

Immediate Action: Organizations should monitor for and apply the firmware updates provided by the device manufacturer, specifically referencing Patch ID ALPS10196993.

Proactive Monitoring: Security teams should monitor device logs for suspicious service crashes or unexpected process behavior involving system-level display components.

Compensating Controls: Ensure that device-level security policies, such as mandatory access control (SELinux) and rigorous application sandboxing, are strictly enforced to prevent initial compromise.

Exploitation status

Public Exploit Available: Unknown

Analyst recommendation

While the requirement for pre-existing system-level access limits the scope of this vulnerability, it remains a serious escalation path for malicious applications or sophisticated threats. Administrators should prioritize the deployment of vendor-supplied security patches as soon as they become available to ensure the integrity of the device kernel and display stack.

More MediaTek CVEs

Sources