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.
Published: 2026-09-07
Score: 6.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Local Privilege Escalation
Action: Immediate Patch
AI Analysis

Impact

An out‑of‑bounds write in the Power HAL module of MediaTek chipsets occurs because a bounds check is omitted. This flaw, classified as CWE-121, could allow a locally running entity that already has System privilege to overwrite memory beyond its intended bounds, potentially corrupting critical data structures or code paths. The result is an escalation of privileges from System level to higher or equivalent authority within the device. User interaction is not required for exploitation.

Affected Systems

MediaTek, Inc. chipsets are affected. The vulnerability exists in the Power HAL component of these hardware platforms. No specific affected firmware or hardware versions are disclosed.

Risk and Exploitability

The CVSS score is 6.7, the EPSS score is less than 1%, and the issue is not listed in the CISA KEV catalog. The flaw can be triggered locally by any process running with System permissions. Attackers with such access could manipulate memory without needing to interact with a user interface. The potential impact, if exploited successfully, would be severe due to the high privilege level involved.

Generated by OpenCVE AI on September 7, 2026 at 16:06 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest firmware patch (ALPS11165543) that fixes the bounds check in the Power HAL module.
  • Ensure the device firmware is updated to the patched version before any further deployment.
  • Verify that all processes on the device run with least privilege; consider disabling unnecessary System‑level services to reduce the attack surface.

Generated by OpenCVE AI on September 7, 2026 at 16:06 UTC.

Tracking

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Advisories

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History

Mon, 07 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Title Potential Out‑of‑Bounds Write in MediaTek Power HAL Leading to Local Privilege Escalation

Mon, 07 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 07 Sep 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Mediatek, Inc.
Mediatek, Inc. mediatek Chipset
Vendors & Products Mediatek, Inc.
Mediatek, Inc. mediatek Chipset

Mon, 07 Sep 2026 03:45:00 +0000

Type Values Removed Values Added
Title Potential Out‑of‑Bounds Write in MediaTek Power HAL Leading to Local Privilege Escalation

Mon, 07 Sep 2026 02:00:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-121
References

Subscriptions

Mediatek, Inc. Mediatek Chipset
cve-icon MITRE

Status: PUBLISHED

Assigner: MediaTek

Published:

Updated: 2026-09-08T03:55:23.217Z

Reserved: 2025-11-03T01:30:59.029Z

Link: CVE-2026-20509

cve-icon Vulnrichment

Updated: 2026-09-07T10:31:47.733Z

cve-icon NVD

Status : Deferred

Published: 2026-09-07T02:17:19.587

Modified: 2026-09-08T18:37:41.047

Link: CVE-2026-20509

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-07T16:15:17Z

Weaknesses
  • CWE-121

    Stack-based Buffer Overflow