CVE-2024-35985

5.5 · MEDIUM

Published May 20, 2024 linux CWE-476 EPSS 0.22% (13th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-35985 is a medium-severity vulnerability affecting linux linux_kernel. 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:

sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()

It was possible to have pick_eevdf() return NULL, which then causes a

NULL-deref. This turned out to be due to entity_eligible() returning

falsely negative because of a s64 multiplcation overflow.

Specifically, reweight_eevdf() computes the vlag without considering

the limit placed upon vlag as update_entity_lag() does, and then the

scaling multiplication (remember that weight is 20bit fixed point) can

overflow. This then leads to the new vruntime being weird which then

causes the above entity_eligible() to go side-ways and claim nothing

is eligible.

Thus limit the range of vlag accordingly.

All this was quite rare, but fatal when it does happen.

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	>= 6.6.4, < 6.6.30	Affected

References

Ref git.kernel.org/stable/c/06f27e6d7bf0abf54488259ef36bbf0e1fccb35c Ref git.kernel.org/stable/c/1560d1f6eb6b398bddd80c16676776c0325fe5fe Ref git.kernel.org/stable/c/470d347b14b0ecffa9b39cf8f644fa2351db3efb Ref git.kernel.org/stable/c/06f27e6d7bf0abf54488259ef36bbf0e1fccb35c Ref git.kernel.org/stable/c/1560d1f6eb6b398bddd80c16676776c0325fe5fe Ref git.kernel.org/stable/c/470d347b14b0ecffa9b39cf8f644fa2351db3efb

Frequently Asked Questions

What is CVE-2024-35985?

CVE-2024-35985 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 20, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-35985?

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-2024-35985?

How can CyberStrike help with CVE-2024-35985?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-35985 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.

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