Out-of-bounds write in MediaTek products - CVE-2025-20645

Vulnerability identifier: #VU105187

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-20645

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to a missing bounds check within KeyInstall. A local application can execute arbitrary code.

MT6765
MT6768
MT6833
MT6835
MT6855
MT6879
MT6886
MT6897
MT6983
MT6985
MT6989
MT8796
Samsung Mobile Firmware
MT6853
MT6893
Google Android

Install security update from vendor's website.

Samsung Mobile Firmware - update to SMR-APR-2025
Google Android - addressed in versions 12L 2025-03-05, 12 2025-03-05, 13 2025-03-05, 14 2025-03-05, 15 2025-03-05

• https://corp.mediatek.com/product-security-bulletin/March-2025

• Multiple vulnerabilities in MediaTek chipsets
• Multiple vulnerabilities in Google Android
• Multiple vulnerabilities in Samsung Mobile Firmware (April 2025)