Out of Bounds Write Vulnerability in MediaTek Vdec Software
CVE-2026-20502

8.4HIGH

Key Information:

Vendor

MediaTek

Vendor
CVE Published:
7 September 2026

What is CVE-2026-20502?

A vulnerability exists in MediaTek's vdec software that allows for an out of bounds write due to a lack of proper bounds checking. This weakness may enable local users to escalate their privileges without requiring additional execution rights. Notably, the vulnerability can be exploited without any user interaction, raising significant security concerns for affected systems. For mitigation, users should apply patch ALPS11262030 as recommended by MediaTek.

Affected Version(s)

MediaTek chipset MT2718

MediaTek chipset MT6580

MediaTek chipset MT6739

References

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.