CVE-2024-56755

5.5 · MEDIUM

Published Dec 29, 2024 linux CWE-401 EPSS 0.21% (11th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-56755 is a medium-severity vulnerability affecting linux linux_kernel. It was published on December 29, 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:

netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING

In fscache_create_volume(), there is a missing memory barrier between the

bit-clearing operation and the wake-up operation. This may cause a

situation where, after a wake-up, the bit-clearing operation hasn't been

detected yet, leading to an indefinite wait. The triggering process is as

follows:

[cookie1] [cookie2] [volume_work]

fscache_perform_lookup

fscache_create_volume

fscache_perform_lookup

fscache_create_volume

fscache_create_volume_work

cachefiles_acquire_volume

clear_and_wake_up_bit

test_and_set_bit

goto maybe_wait

goto no_wait

In the above process, co

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 5.17, < 6.1.120	Affected

References

Ref git.kernel.org/stable/c/22f9400a6f3560629478e0a64247b8fcc811a24d Ref git.kernel.org/stable/c/539fabba965e119b98066fc6ba5257b5eaf4eda2 Ref git.kernel.org/stable/c/8beb682cc9a0798a280bbb95e3e41617237090b2 Ref git.kernel.org/stable/c/8cc1df3113cb71a0df2c46dd5b102c9e11c8a8c6 Ref git.kernel.org/stable/c/ddab02607eed9e415dc62fde421d4329e5345315 Ref lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Frequently Asked Questions

What is CVE-2024-56755?

CVE-2024-56755 is a medium-severity vulnerability affecting linux linux_kernel. It was published on December 29, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56755?

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-2024-56755?

How can CyberStrike help with CVE-2024-56755?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-56755 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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HackBrowser

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