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CVE-2024-56654

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating The usage of rcu_read_(un)lock while inside list_for_each_ent…

Published Dec 27, 2024EPSS 0.23%

Overview

CVE-2024-56654 is a high-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating

The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is

not safe since for the most part entries fetched this way shall be

treated as rcu_dereference:

Note that the value returned by rcu_dereference() is valid

only within the enclosing RCU read-side critical section [1]_.

For example, the following is **not** legal::

rcu_read_lock();

p = rcu_dereference(head.next);

rcu_read_unlock();

x = p->address; /* BUG!!! */

rcu_read_lock();

y = p->data; /* BUG!!! */

rcu_read_unlock();

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911bRefgit.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93aeRefgit.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56654?

CVE-2024-56654 is a high-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-56654?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56654?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-56654?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56654 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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