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CVE-2024-36896

9.1 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix access violation during port device removal Testing with KASAN and syzkaller revealed a bug in port.c:disable_st…

Published May 30, 2024CWE-476EPSS 0.92%

Overview

CVE-2024-36896 is a critical-severity vulnerability. It was published on May 30, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

USB: core: Fix access violation during port device removal

Testing with KASAN and syzkaller revealed a bug in port.c:disable_store():

usb_hub_to_struct_hub() can return NULL if the hub that the port belongs to

is concurrently removed, but the function does not check for this

possibility before dereferencing the returned value.

It turns out that the first dereference is unnecessary, since hub->intfdev

is the parent of the port device, so it can be changed easily. Adding a

check for hub == NULL prevents further problems.

The same bug exists in the disable_show() routine, and it can be fixed the

same way.

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/5f1d68ef5ddac27c6b997adccd1c339cef1e6848Refgit.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277Refgit.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434Refgit.kernel.org/stable/c/a4b46d450c49f32e9d4247b421e58083fde304ceRefgit.kernel.org/stable/c/5f1d68ef5ddac27c6b997adccd1c339cef1e6848Refgit.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277Refgit.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434Refgit.kernel.org/stable/c/a4b46d450c49f32e9d4247b421e58083fde304ce

How CyberStrike helps

Frequently asked questions

What is CVE-2024-36896?

CVE-2024-36896 is a critical-severity vulnerability. It was published on May 30, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2024-36896?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-36896?

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-2024-36896?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-36896 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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