CVE-2026-20478

In Audio HAL, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981454 (Note: For MT6880, MT6890, MT6988, MT6990) / AUTO00851293 (Note: For MT2735, MT2737); Issue ID: MSV-7638.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.mediatek.com/product-security-bulletin/August-2026	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mediatek:mt2735_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt2735:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:mediatek:mt2737_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt2737:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:mediatek:mt6880_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6880:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:mediatek:mt6890_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6890:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

cpe:2.3:o:mediatek:mt6988_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6988:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND

cpe:2.3:o:mediatek:mt6990_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6990:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-03 03:16

Updated : 2026-08-20 14:58

NVD link : CVE-2026-20478

Mitre link : CVE-2026-20478

CVE.ORG link : CVE-2026-20478

JSON object : View

Products Affected

mediatek

mt2735_firmware
mt6988_firmware
mt2737
mt6880
mt6890_firmware
mt6988
mt2737_firmware
mt6990
mt6890
mt2735
mt6990_firmware
mt6880_firmware

CWE

CWE-787

Out-of-bounds Write

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