CVE-2026-20477: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
In display, 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: ALPS11009963; Issue ID: MSV-7658.
AI Analysis
Technical Summary
This vulnerability (CWE-787) involves an out-of-bounds write in the display functionality of MediaTek chipsets caused by a missing bounds check. An attacker with existing System privileges could exploit this flaw to escalate privileges locally. No user interaction is needed for exploitation. The affected chipsets include MT6991, MT6993, MT8188, MT8189, MT8668, MT8676, MT8678, MT8781, MT8799, and MT8910. There is no vendor advisory or patch information provided, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation could lead to local escalation of privilege, allowing an attacker with System privileges to gain higher privileges or execute arbitrary code in the context of the display component. There is no indication of impact on confidentiality or availability beyond the stated scope.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented in the provided data.
CVE-2026-20477: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
In display, 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: ALPS11009963; Issue ID: MSV-7658.
CVSS v3.1
Score 6.0medium
Affected software
MediaTek, Inc.
MediaTek chipset
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-787) involves an out-of-bounds write in the display functionality of MediaTek chipsets caused by a missing bounds check. An attacker with existing System privileges could exploit this flaw to escalate privileges locally. No user interaction is needed for exploitation. The affected chipsets include MT6991, MT6993, MT8188, MT8189, MT8668, MT8676, MT8678, MT8781, MT8799, and MT8910. There is no vendor advisory or patch information provided, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation could lead to local escalation of privilege, allowing an attacker with System privileges to gain higher privileges or execute arbitrary code in the context of the display component. There is no indication of impact on confidentiality or availability beyond the stated scope.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented in the provided data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.016Z
- State
- PUBLISHED
Threat ID: 6a700183bf32cb7a34d5ca9d
Added to database: 08/03/2026, 02:48:35 UTC
Last enriched: 08/10/2026, 14:38:10 UTC
Last updated: 09/16/2026, 22:01:33 UTC
Views: 26
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