CVE-2026-20475 - Vulnerability Details - OpenCVE

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: ALPS11004276; Issue ID: MSV-7748.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00143.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Mediatek, Inc.	Mediatek Chipset

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Mediatek, Inc.	Mediatek Chipset

References

Link	Providers
https://www.mediatek.com/product-security-bulletin/August-2026

History

Mon, 03 Aug 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 03 Aug 2026 09:15:00 +0000

Type	Values Removed	Values Added
Title		Out‑of‑Bounds Write in MediaTek Display Driver Allows Local Privilege Escalation

Mon, 03 Aug 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, 03 Aug 2026 02:45:00 +0000

Type	Values Removed	Values Added
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: ALPS11004276; Issue ID: MSV-7748.
Weaknesses		CWE-787
References		https://www.mediatek.com/product-security-bulletin/August-2026

MITRE

Status: PUBLISHED

Assigner: MediaTek

Published: 2026-08-03T02:05:29.778Z

Updated: 2026-08-03T19:06:09.628Z

Reserved: 2025-11-03T01:30:59.016Z

Link: CVE-2026-20475

Vulnrichment

Updated: 2026-08-03T19:06:06.278Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-03T09:00:15Z

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20475", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "state": "PUBLISHED", "assignerShortName": "MediaTek", "dateReserved": "2025-11-03T01:30:59.016Z", "datePublished": "2026-08-03T02:05:29.778Z", "dateUpdated": "2026-08-03T19:06:09.628Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-08-03T02:05:29.778Z"}, "descriptions": [{"lang": "en", "value": "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: ALPS11004276; Issue ID: MSV-7748."}], "affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "defaultStatus": "unaffected", "versions": [{"version": "MT6991", "status": "affected"}, {"version": "MT6993", "status": "affected"}, {"version": "MT8126", "status": "affected"}, {"version": "MT8171", "status": "affected"}, {"version": "MT8188", "status": "affected"}, {"version": "MT8189", "status": "affected"}, {"version": "MT8367", "status": "affected"}, {"version": "MT8668", "status": "affected"}, {"version": "MT8676", "status": "affected"}, {"version": "MT8678", "status": "affected"}, {"version": "MT8766", "status": "affected"}, {"version": "MT8768", "status": "affected"}, {"version": "MT8781", "status": "affected"}, {"version": "MT8786", "status": "affected"}, {"version": "MT8791T", "status": "affected"}, {"version": "MT8799", "status": "affected"}, {"version": "MT8910", "status": "affected"}]}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/August-2026"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-03T19:05:43.425388Z", "id": "CVE-2026-20475", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-03T19:06:09.628Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-20475", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-03T19:05:43.425388Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-03T19:06:06.278Z"}}], "cna": {"affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "versions": [{"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8126"}, {"status": "affected", "version": "MT8171"}, {"status": "affected", "version": "MT8188"}, {"status": "affected", "version": "MT8189"}, {"status": "affected", "version": "MT8367"}, {"status": "affected", "version": "MT8668"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8766"}, {"status": "affected", "version": "MT8768"}, {"status": "affected", "version": "MT8781"}, {"status": "affected", "version": "MT8786"}, {"status": "affected", "version": "MT8791T"}, {"status": "affected", "version": "MT8799"}, {"status": "affected", "version": "MT8910"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/August-2026"}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "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: ALPS11004276; Issue ID: MSV-7748."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-08-03T02:05:29.778Z"}}}, "cveMetadata": {"cveId": "CVE-2026-20475", "state": "PUBLISHED", "dateUpdated": "2026-08-03T19:06:09.628Z", "dateReserved": "2025-11-03T01:30:59.016Z", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "datePublished": "2026-08-03T02:05:29.778Z", "assignerShortName": "MediaTek"}, "dataVersion": "5.2"}