CVE-2026-20476: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
CVE-2026-20476 is an out-of-bounds write vulnerability in MediaTek chipsets MT6813, MT6986, and MT6988. It arises from a missing bounds check in the ccci component, potentially allowing local denial of service. Exploitation requires user execution privileges but does not require user interaction. No patch or official remediation guidance is currently confirmed.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write (CWE-787) in the ccci component of certain MediaTek chipsets (MT6813, MT6986, MT6988) caused by a missing bounds check. The flaw can lead to a local denial of service condition when exploited by a user with execution privileges. The vulnerability does not require user interaction for exploitation. There is no CVSS score or vendor advisory indicating patch availability or remediation status at this time.
Potential Impact
An attacker with local user execution privileges can exploit this vulnerability to cause a denial of service on affected MediaTek chipsets. This may disrupt normal device operation but does not indicate remote exploitation or privilege escalation beyond the user level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local user access to trusted parties to reduce risk.
CVE-2026-20476: CWE-787 Out-of-bounds Write in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20476 is an out-of-bounds write vulnerability in MediaTek chipsets MT6813, MT6986, and MT6988. It arises from a missing bounds check in the ccci component, potentially allowing local denial of service. Exploitation requires user execution privileges but does not require user interaction. No patch or official remediation guidance is currently confirmed.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write (CWE-787) in the ccci component of certain MediaTek chipsets (MT6813, MT6986, MT6988) caused by a missing bounds check. The flaw can lead to a local denial of service condition when exploited by a user with execution privileges. The vulnerability does not require user interaction for exploitation. There is no CVSS score or vendor advisory indicating patch availability or remediation status at this time.
Potential Impact
An attacker with local user execution privileges can exploit this vulnerability to cause a denial of service on affected MediaTek chipsets. This may disrupt normal device operation but does not indicate remote exploitation or privilege escalation beyond the user level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local user access to trusted parties to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.016Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a700183bf32cb7a34d5ca9a
Added to database: 08/03/2026, 02:48:35 UTC
Last enriched: 08/03/2026, 03:23:25 UTC
Last updated: 08/03/2026, 03:23:25 UTC
Views: 2
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