Out of Bounds Write Vulnerability in KeyInstall by MediaTek
CVE-2025-20795

7.8HIGH

Key Information:

Vendor

MediaTek
Status
Mt2718, Mt6580, Mt6739, Mt6761, Mt6765, Mt6768, Mt6779, Mt6781, Mt6785, Mt6789, Mt6833, Mt6835, Mt6853, Mt6855, Mt6873, Mt6877, Mt6878, Mt6879, Mt6883, Mt6885, Mt6886, Mt6889, Mt6893, Mt6895, Mt6897, Mt6899, Mt6983, Mt6985, Mt6989, Mt6991, Mt8186, Mt8188, Mt8195, Mt8196, Mt8370, Mt8390, Mt8391, Mt8395, Mt8676, Mt8678, Mt8696, Mt8755, Mt8766, Mt8768, Mt8781, Mt8786, Mt8788e, Mt8791t, Mt8792, Mt8793, Mt8796, Mt8873, Mt8883, Mt8893
Vendor
CVE Published:
6 January 2026

What is CVE-2025-20795?

The vulnerability in MediaTek's KeyInstall arises from a missing bounds check, which allows a malicious entity with system privileges to execute an out of bounds write. This flaw can result in local privilege escalation without requiring any user interaction. Mitigation is possible through the application of the provided patches.

Affected Version(s)

MT2718, MT6580, MT6739, MT6761, MT6765, MT6768, MT6779, MT6781, MT6785, MT6789, MT6833, MT6835, MT6853, MT6855, MT6873, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, MT6991, MT8186, MT8188, MT8195, MT8196, MT8370, MT8390, MT8391, MT8395, MT8676, MT8678, MT8696, MT8755, MT8766, MT8768, MT8781, MT8786, MT8788E, MT8791T, MT8792, MT8793, MT8796, MT8873, MT8883, MT8893 Android 13.0, 14.0, 15.0, 16.0

References

https://corp.mediatek.com/product-security-bulletin/Janua...

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-20795 : Out of Bounds Write Vulnerability in KeyInstall by MediaTek