Out-of-bounds write in MediaTek products - CVE-2025-20635

Vulnerability identifier: #VU103563

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-2025-20635

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 DA. A local application can execute arbitrary code.

MT6890
MT8390
MT8370
MT6990
MT6989
MT6985
MT6983
MT6980
MT6897
MT6895
MT2737
MT6886
MT6880
MT6879
MT6878
MT6855
MT6835
MT6789
Samsung Mobile Firmware
MT6781
Google Android

Install security update from vendor's website.

Google Android - addressed in versions 12L 2025-02-05, 12 2025-02-05, 13 2025-02-05, 14 2025-02-05, 15 2025-02-05
Samsung Mobile Firmware - update to SMR-MAR-2025

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

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