CVE-2026-20477: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20477 is an out-of-bounds write vulnerability in the display component of MediaTek chipsets. It arises from a missing bounds check, potentially allowing local escalation of privilege if the attacker already has System privilege. Exploitation does not require user interaction. Multiple MediaTek chipset models are affected. No CVSS score 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 certain MediaTek chipsets due to a missing bounds check. The flaw could enable a local attacker with existing System privileges to escalate their privileges further. The affected products include specific MediaTek chipset models such as MT6991, MT6993, MT8188, MT8189, MT8668, MT8676, MT8678, MT8781, MT8799, and MT8910. There is no indication of user interaction required for exploitation. No official patch or remediation level has been disclosed by MediaTek as of the publication date.
Potential Impact
The vulnerability allows a local attacker who already has System privileges to perform an out-of-bounds write, which could lead to escalation of privileges beyond the current level. This could compromise system integrity or stability on affected MediaTek chipsets. There is no evidence of known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been published, users should monitor MediaTek advisories for updates. No specific mitigations are provided in the available data.
CVE-2026-20477: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20477 is an out-of-bounds write vulnerability in the display component of MediaTek chipsets. It arises from a missing bounds check, potentially allowing local escalation of privilege if the attacker already has System privilege. Exploitation does not require user interaction. Multiple MediaTek chipset models are affected. No CVSS score 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 certain MediaTek chipsets due to a missing bounds check. The flaw could enable a local attacker with existing System privileges to escalate their privileges further. The affected products include specific MediaTek chipset models such as MT6991, MT6993, MT8188, MT8189, MT8668, MT8676, MT8678, MT8781, MT8799, and MT8910. There is no indication of user interaction required for exploitation. No official patch or remediation level has been disclosed by MediaTek as of the publication date.
Potential Impact
The vulnerability allows a local attacker who already has System privileges to perform an out-of-bounds write, which could lead to escalation of privileges beyond the current level. This could compromise system integrity or stability on affected MediaTek chipsets. There is no evidence of known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been published, users should monitor MediaTek advisories for updates. No specific mitigations are provided in the available data.
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: 6a700183bf32cb7a34d5ca9d
Added to database: 08/03/2026, 02:48:35 UTC
Last enriched: 08/03/2026, 03:23:17 UTC
Last updated: 08/03/2026, 03:23:17 UTC
Views: 2
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