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CVE-2024-35974

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: block: fix q->blkg_list corruption during disk rebind Multiple gendisk instances can allocated/added for single request queue i…

Published May 20, 2024EPSS 0.23%

Overview

CVE-2024-35974 is a medium-severity vulnerability. It was published on May 20, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

block: fix q->blkg_list corruption during disk rebind

Multiple gendisk instances can allocated/added for single request queue

in case of disk rebind. blkg may still stay in q->blkg_list when calling

blkcg_init_disk() for rebind, then q->blkg_list becomes corrupted.

Fix the list corruption issue by:

- add blkg_init_queue() to initialize q->blkg_list & q->blkcg_mutex only

- move calling blkg_init_queue() into blk_alloc_queue()

The list corruption should be started since commit f1c006f1c685 ("blk-cgroup:

synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()")

which delays removing blkg from q->blkg_list into blkg_free_workfn().

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/083b58373463a6e5ee60ecb135269348f68ad7dfRefgit.kernel.org/stable/c/740ffad95ca8033bd6e080ed337655b13b4d38acRefgit.kernel.org/stable/c/858c489d81d659af17a4d11cfaad2afb42e47a76Refgit.kernel.org/stable/c/8b8ace080319a866f5dfe9da8e665ae51d971c54Refgit.kernel.org/stable/c/b5dae1cd0d8368b4338430ff93403df67f0b8bccRefgit.kernel.org/stable/c/740ffad95ca8033bd6e080ed337655b13b4d38acRefgit.kernel.org/stable/c/858c489d81d659af17a4d11cfaad2afb42e47a76Refgit.kernel.org/stable/c/8b8ace080319a866f5dfe9da8e665ae51d971c54

How CyberStrike helps

Frequently asked questions

What is CVE-2024-35974?

CVE-2024-35974 is a medium-severity vulnerability. It was published on May 20, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-35974?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-35974?

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-2024-35974?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-35974 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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