What’s Vulnerable › Vulnerabilities

CVE-2024-56590: Bluetooth: hci_core: Fix not checking skb length on hci_acldata_packet

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-27 · updated 2026-08-04
• Weakness: CWE-120

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.

Affected products

• Linux kernel: before 5.15.174; from 5.16 before 6.1.120; from 6.2 before 6.6.66; from 6.7 before 6.12.5 — fixed in 5.15.174, 6.1.120, 6.12.5, 6.6.66

How to fix

Upgrade to a fixed version: Linux kernel 5.15.174, 6.1.120, 6.12.5, 6.6.66. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/219960a48771b35a3857a491b955c31d6c33d581
• https://git.kernel.org/stable/c/3fe288a8214e7dd784d1f9b7c9e448244d316b47
• https://git.kernel.org/stable/c/559b1c7ac2e212a23b3833d3baf3bd957771d02e
• https://git.kernel.org/stable/c/5e50d12cc6e95e1fde08f5db6992b616f714b0fb
• https://git.kernel.org/stable/c/93a6160dc198ffe5786da8bd8588cfd17f53b29a
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Get alerted when CVE-2024-56590 or the next vulnerability affects your stack