CVE-2024-41021

5.5 · MEDIUM

Published Jul 29, 2024 linux CWE-401 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-2024-41021 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 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:

s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()

There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on

s390. Therefore we do not expect to see VM_FAULT_HWPOISON in

do_exception().

However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more

general"), it is possible to see VM_FAULT_HWPOISON in combination with

PTE_MARKER_POISONED, even on architectures that do not support HWPOISON

otherwise. In this case, we will end up on the BUG() in do_exception().

Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar

to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault

flags, for easier debugging.

Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot

support swap entries on other levels than PTE level.

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, < 6.6.44	Affected

References

Ref git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0 Ref git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff Ref git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b Ref git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a Ref git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff Ref git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b Ref git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a

Frequently Asked Questions

What is CVE-2024-41021?

CVE-2024-41021 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 29, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-41021?

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-2024-41021?

How can CyberStrike help with CVE-2024-41021?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-41021 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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