Executive Summary
A high-severity vulnerability, CVE-2026-20524, has been identified in MediaTek chipsets. This vulnerability could lead to local escalation of privilege with no additional execution privileges needed. It is caused by improper input validation in the apu component.
Technical Analysis
The vulnerability is classified as a memory corruption issue due to improper input validation in the apu component of MediaTek chipsets. The attack vector is local, meaning an attacker would need to have local access to the system to exploit this vulnerability. The root cause is the lack of proper input validation, which allows an attacker to corrupt memory.
How It Gets Exploited
An attacker with local access to a vulnerable MediaTek chipset could exploit this vulnerability by providing crafted input that is not properly validated by the apu component. This could lead to memory corruption and potentially allow the attacker to escalate privileges locally without needing additional execution privileges. The specific action triggering the vulnerability involves providing malformed input that causes a memory corruption issue.
Impact Assessment
The affected products include various MediaTek chipsets such as MT6899, MT6993, MT8668, MT8781, MT8793, and MT8910. The vulnerability has a CVSS score of 8.4, indicating a high severity level. An attacker could achieve local escalation of privilege, potentially leading to higher privileges on the system.
Recommended Actions
To mitigate this vulnerability, it is recommended to update the affected MediaTek chipsets to a version that includes the patch. Specifically, apply patch ALPS11249004 as referenced in the MediaTek product security bulletin for October 2026. Additionally, implement proper input validation and memory management practices to prevent similar issues.
Sources
- National Vulnerability Database (NVD)
- MediaTek Product Security Bulletin for October 2026