MediaTek Battery OOB Write Escalation
CVE-2025-20798 Published on January 6, 2026
In battery, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10315812; Issue ID: MSV-5533.
Vulnerability Analysis
CVE-2025-20798 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2025-20798 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2025-20798
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Affected Versions
MediaTek, Inc. MediaTek chipset:- Version MT2718 is affected.
- Version MT6765 is affected.
- Version MT6768 is affected.
- Version MT6781 is affected.
- Version MT6833 is affected.
- Version MT6835 is affected.
- Version MT6853 is affected.
- Version MT6855 is affected.
- Version MT6877 is affected.
- Version MT6879 is affected.
- Version MT6893 is affected.
- Version MT6985 is affected.
- Version MT6989 is affected.
- Version MT6991 is affected.
- Version MT8186 is affected.
- Version MT8188 is affected.
- Version MT8196 is affected.
- Version MT8367 is affected.
- Version MT8391 is affected.
- Version MT8676 is affected.
- Version MT8678 is affected.
- Version MT8696 is affected.
- Version MT8766 is affected.
- Version MT8768 is affected.
- Version MT8781 is affected.
- Version MT8786 is affected.
- Version MT8788E is affected.
- Version MT8791T is affected.
- Version MT8792 is affected.
- Version MT8793 is affected.
- Version MT8796 is affected.
- Version MT8873 is affected.
- Version MT8883 is affected.
- Version MT8893 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.