CVE-2026-20542

Published: Oct 5, 2026Modified: Oct 9, 2026

6.7

Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitability: 0.8 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

In apusys, there is a possible memory corruption due to use after free. 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: ALPS11076799; Issue ID: MSV-8143.

Affected (19)

Products: Mediatek: Mt2718 Firmware, Mt6878 Firmware, Mt6897 Firmware, Mt6899 Firmware, Mt6989 Firmware, Mt6991 Firmware, Mt8171 Firmware, Mt8188 Firmware, Mt8189 Firmware, Mt8196 Firmware, Mt8370 Firmware, Mt8371 Firmware, Mt8390 Firmware, Mt8391 Firmware, Mt8395 Firmware, Mt8678 Firmware, Mt8792 Firmware, Mt8793 Firmware, Mt8796 Firmware

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt2718 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt2718	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6878 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6878	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6897 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6897	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6899 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6899	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6989 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6989	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6991 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6991	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8171 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8171	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8188 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8188	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8189 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8189	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8196 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8196	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8370 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8370	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8371 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8371	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8390 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8390	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8391 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8391	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8395 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8395	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8678 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8678	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8792 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8792	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8793 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8793	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8796 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8796	All versions

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://www.mediatek.com/product-security-bulletin/October-2026

Source: security@mediatek.com

Vendor Advisory

Timeline

No history available yet.