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CVE-2024-38618

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Set lower bound of start tick time Currently ALSA timer doesn't have the lower limit of the start tick time, and i…

Published Jun 19, 2024EPSS 0.64%

Overview

CVE-2024-38618 is a medium-severity vulnerability. It was published on June 19, 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:

ALSA: timer: Set lower bound of start tick time

Currently ALSA timer doesn't have the lower limit of the start tick

time, and it allows a very small size, e.g. 1 tick with 1ns resolution

for hrtimer. Such a situation may lead to an unexpected RCU stall,

where the callback repeatedly queuing the expire update, as reported

by fuzzer.

This patch introduces a sanity check of the timer start tick time, so

that the system returns an error when a too small start size is set.

As of this patch, the lower limit is hard-coded to 100us, which is

small enough but can still work somehow.

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/2c95241ac5fc90c929d6c0c023e84bf0d30e84c3Refgit.kernel.org/stable/c/4a63bd179fa8d3fcc44a0d9d71d941ddd62f0c4eRefgit.kernel.org/stable/c/68396c825c43664b20a3a1ba546844deb2b4e48fRefgit.kernel.org/stable/c/74bfb8d90f2601718ae203faf45a196844c01fa1Refgit.kernel.org/stable/c/83f0ba8592b9e258fd80ac6486510ab1dcd7ad6eRefgit.kernel.org/stable/c/abb1ad69d98cf1ff25bb14fff0e7c3f66239e1cdRefgit.kernel.org/stable/c/bdd0aa055b8ec7e24bbc19513f3231958741d0abRefgit.kernel.org/stable/c/ceab795a67dd28dd942d0d8bba648c6c0f7a044bRefgit.kernel.org/stable/c/2c95241ac5fc90c929d6c0c023e84bf0d30e84c3Refgit.kernel.org/stable/c/4a63bd179fa8d3fcc44a0d9d71d941ddd62f0c4e

How CyberStrike helps

Frequently asked questions

What is CVE-2024-38618?

CVE-2024-38618 is a medium-severity vulnerability. It was published on June 19, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-38618?

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-2024-38618?

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-2024-38618?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-38618 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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