CVE-2026-20464: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20464 is an out-of-bounds write vulnerability in the HEVC decoder of certain MediaTek chipsets caused by an integer overflow. Exploitation does not require user interaction but requires the attacker to already have System privilege. This vulnerability could lead to remote escalation of privilege. The affected MediaTek chipset versions are MT6761, MT8766, and MT8768. No official patch or remediation guidance has been provided yet.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20464) involves an out-of-bounds write in the HEVC decoder component of MediaTek chipsets due to an integer overflow condition. The flaw could allow an attacker who already has System-level privileges to escalate their privileges further remotely without user interaction. The affected chipsets are specifically MT6761, MT8766, and MT8768. There is no CVSS score assigned, no known exploits in the wild, and no vendor advisory or patch information available at this time.
Potential Impact
If exploited, this vulnerability could allow an attacker with existing System privileges to escalate their privileges further remotely. This could potentially lead to greater control over the affected device or system. However, exploitation requires the attacker to have already obtained System-level access, limiting the initial attack vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published by MediaTek at this time.
CVE-2026-20464: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20464 is an out-of-bounds write vulnerability in the HEVC decoder of certain MediaTek chipsets caused by an integer overflow. Exploitation does not require user interaction but requires the attacker to already have System privilege. This vulnerability could lead to remote escalation of privilege. The affected MediaTek chipset versions are MT6761, MT8766, and MT8768. No official patch or remediation guidance has been provided yet.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20464) involves an out-of-bounds write in the HEVC decoder component of MediaTek chipsets due to an integer overflow condition. The flaw could allow an attacker who already has System-level privileges to escalate their privileges further remotely without user interaction. The affected chipsets are specifically MT6761, MT8766, and MT8768. There is no CVSS score assigned, no known exploits in the wild, and no vendor advisory or patch information available at this time.
Potential Impact
If exploited, this vulnerability could allow an attacker with existing System privileges to escalate their privileges further remotely. This could potentially lead to greater control over the affected device or system. However, exploitation requires the attacker to have already obtained System-level access, limiting the initial attack vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published by MediaTek at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.015Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a700181bf32cb7a34d5c9dc
Added to database: 08/03/2026, 02:48:33 UTC
Last enriched: 08/03/2026, 03:37:25 UTC
Last updated: 08/03/2026, 03:37:49 UTC
Views: 2
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