CVE-2024-35846

5.5 · MEDIUM

Published May 17, 2024 linux CWE-476 EPSS 0.19% (9th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-35846 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 17, 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:

mm: zswap: fix shrinker NULL crash with cgroup_disable=memory

Christian reports a NULL deref in zswap that he bisected down to the zswap

shrinker. The issue also cropped up in the bug trackers of libguestfs [1]

and the Red Hat bugzilla [2].

The problem is that when memcg is disabled with the boot time flag, the

zswap shrinker might get called with sc->memcg == NULL. This is okay in

many places, like the lruvec operations. But it crashes in

memcg_page_state() - which is only used due to the non-node accounting of

cgroup's the zswap memory to begin with.

Nhat spotted that the memcg can be NULL in the memcg-disabled case, and I

was then able to reproduce the crash locally as well.

[1] https://github.com/libguestfs/libguestfs/issues/139

[2] https://bugzilla.redhat.com/show_bug.cgi?id=2275252

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	>= 6.8, < 6.8.9	Affected

References

Ref git.kernel.org/stable/c/682886ec69d22363819a83ddddd5d66cb5c791e1 Ref git.kernel.org/stable/c/b0fdabc908a7f81d12382c87ca9e46a9c2e14042 Ref git.kernel.org/stable/c/682886ec69d22363819a83ddddd5d66cb5c791e1 Ref git.kernel.org/stable/c/b0fdabc908a7f81d12382c87ca9e46a9c2e14042

Frequently Asked Questions

What is CVE-2024-35846?

CVE-2024-35846 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-35846?

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-2024-35846?

How can CyberStrike help with CVE-2024-35846?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-35846 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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