CVE-2026-20529
Received Received - Intake

Out-of-Bounds Write in MediaTek Battery Driver

Vulnerability report for CVE-2026-20529, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: MediaTek, Inc.

Description

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: ALPS11276677; Issue ID: MSV-9217.

CVSS Scores

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediatek battery *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is in the battery component of a system. It involves a missing bounds check that could allow an out of bounds write operation. This flaw could be exploited to escalate local privileges if an attacker already has System privilege access. No user interaction is required for exploitation.

Impact Analysis

If exploited, this vulnerability could allow an attacker with System privilege to gain further elevated access, potentially compromising the entire system. This could lead to unauthorized data access, system manipulation, or other malicious activities depending on the attacker's goals.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it involves a local privilege escalation in a specific hardware component (battery) with System privilege already obtained. No data exposure or privacy violation is indicated.

Mitigation Strategies

Apply the patch identified as ALPS11276677 to address the missing bounds check in the battery component. Ensure the System privilege is properly restricted to prevent local escalation of privilege.

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