CVE-2026-20475: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20475 is an out-of-bounds write vulnerability in the display component of MediaTek chipsets caused by a missing bounds check. Exploitation does not require user interaction but requires the attacker to already have System privilege. This vulnerability could allow local escalation of privilege. Multiple MediaTek chipset models are affected. No patch or official remediation information is currently available.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write (CWE-787) in the display functionality of various MediaTek chipsets due to a missing bounds check. An attacker with existing System privileges could exploit this flaw to escalate privileges locally. The issue does not require user interaction for exploitation. The affected chipsets include MT6991, MT6993, MT8126, MT8171, MT8188, MT8189, MT8367, MT8668, MT8676, MT8678, MT8766, MT8768, MT8781, MT8786, MT8799, and MT8910. There is no CVSS score or vendor advisory indicating patch availability or mitigation status at this time.
Potential Impact
The vulnerability allows a local attacker who already has System privileges to perform an out-of-bounds write, potentially leading to escalation of privileges beyond the current level. This could compromise system integrity or stability. No remote exploitation or user interaction is required, but initial System privilege is a prerequisite. There are no known exploits in the wild reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation is documented, users should monitor MediaTek advisories for updates. No specific mitigations are provided at this time.
CVE-2026-20475: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20475 is an out-of-bounds write vulnerability in the display component of MediaTek chipsets caused by a missing bounds check. Exploitation does not require user interaction but requires the attacker to already have System privilege. This vulnerability could allow local escalation of privilege. Multiple MediaTek chipset models are affected. No patch or official remediation information is currently available.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write (CWE-787) in the display functionality of various MediaTek chipsets due to a missing bounds check. An attacker with existing System privileges could exploit this flaw to escalate privileges locally. The issue does not require user interaction for exploitation. The affected chipsets include MT6991, MT6993, MT8126, MT8171, MT8188, MT8189, MT8367, MT8668, MT8676, MT8678, MT8766, MT8768, MT8781, MT8786, MT8799, and MT8910. There is no CVSS score or vendor advisory indicating patch availability or mitigation status at this time.
Potential Impact
The vulnerability allows a local attacker who already has System privileges to perform an out-of-bounds write, potentially leading to escalation of privileges beyond the current level. This could compromise system integrity or stability. No remote exploitation or user interaction is required, but initial System privilege is a prerequisite. There are no known exploits in the wild reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation is documented, users should monitor MediaTek advisories for updates. No specific mitigations are provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.016Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a700183bf32cb7a34d5ca97
Added to database: 08/03/2026, 02:48:35 UTC
Last enriched: 08/03/2026, 03:23:34 UTC
Last updated: 08/03/2026, 03:23:34 UTC
Views: 2
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