CVE-2026-20509
Received Received - Intake

Power HAL Missing Bounds Check Leading to Privilege Escalation

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: MediaTek, Inc.

Description
In Power HAL, 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: ALPS11165543; Issue ID: MSV-9011.

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-20509
EUVD
EUVD-2026-72202

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediatek power_hal to ALPS11165543 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This is a local privilege escalation vulnerability in Power HAL due to a missing bounds check that allows out of bounds write. It requires the attacker to already have System privilege access. No user interaction is needed for exploitation.

Impact Analysis

If exploited, this vulnerability could allow an attacker with System privileges to escalate their access further, potentially gaining control over the device or executing arbitrary code. This could lead to unauthorized data access or system manipulation.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a local privilege escalation in Power HAL, which could allow an attacker with System privileges to execute arbitrary code. However, no evidence suggests this vulnerability affects data protection, privacy, or security controls required by GDPR or HIPAA.

Mitigation Strategies

Apply the patch provided by MediaTek with Patch ID ALPS11165543 to address the missing bounds check in Power HAL. Ensure the patch is deployed to all affected systems to prevent potential local privilege escalation.

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