CVE-2026-20464: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
In hevc decoder, there is a possible out of bounds write due to an integer overflow. This could lead to remote escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11104718; Issue ID: MSV-8297.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write in the HEVC decoder component of MediaTek chipsets MT6761, MT8766, and MT8768, triggered by an integer overflow. The flaw could allow an attacker with existing System privileges to escalate their privileges remotely without user interaction. The issue is tracked as CVE-2026-20464 and corresponds to CWE-787 (Out-of-bounds Write). No confirmed patch or remediation level is provided in the available data.
Potential Impact
An attacker who has already obtained System privileges could exploit this vulnerability to escalate privileges further remotely. The vulnerability affects confidentiality and integrity but not availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to systems with affected MediaTek chipsets and monitor for suspicious activity from users with System privileges.
CVE-2026-20464: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
In hevc decoder, there is a possible out of bounds write due to an integer overflow. This could lead to remote escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11104718; Issue ID: MSV-8297.
CVSS v3.1
Score 6.5medium
Affected software
MediaTek, Inc.
MediaTek chipset
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write in the HEVC decoder component of MediaTek chipsets MT6761, MT8766, and MT8768, triggered by an integer overflow. The flaw could allow an attacker with existing System privileges to escalate their privileges remotely without user interaction. The issue is tracked as CVE-2026-20464 and corresponds to CWE-787 (Out-of-bounds Write). No confirmed patch or remediation level is provided in the available data.
Potential Impact
An attacker who has already obtained System privileges could exploit this vulnerability to escalate privileges further remotely. The vulnerability affects confidentiality and integrity but not availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to systems with affected MediaTek chipsets and monitor for suspicious activity from users with System privileges.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.015Z
- State
- PUBLISHED
Threat ID: 6a700181bf32cb7a34d5c9dc
Added to database: 08/03/2026, 02:48:33 UTC
Last enriched: 08/10/2026, 14:34:18 UTC
Last updated: 09/16/2026, 22:01:33 UTC
Views: 26
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.