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CVE-2024-42230

4.4 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix scv instruction crash with kexec kexec on pseries disables AIL (reloc_on_exc), required for scv instructio…

Published Jul 30, 2024EPSS 0.20%

Overview

CVE-2024-42230 is a medium-severity vulnerability. It was published on July 30, 2024 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.4, 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:

powerpc/pseries: Fix scv instruction crash with kexec

kexec on pseries disables AIL (reloc_on_exc), required for scv

instruction support, before other CPUs have been shut down. This means

they can execute scv instructions after AIL is disabled, which causes an

interrupt at an unexpected entry location that crashes the kernel.

Change the kexec sequence to disable AIL after other CPUs have been

brought down.

As a refresher, the real-mode scv interrupt vector is 0x17000, and the

fixed-location head code probably couldn't easily deal with implementing

such high addresses so it was just decided not to support that interrupt

at all.

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/21a741eb75f80397e5f7d3739e24d7d75e619011Refgit.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3Refgit.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407cRefgit.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5Refgit.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011Refgit.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3Refgit.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407cRefgit.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-42230?

CVE-2024-42230 is a medium-severity vulnerability. It was published on July 30, 2024 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2024-42230?

This vulnerability has a CVSS 3.1 base score of 4.4, 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-2024-42230?

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-2024-42230?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-42230 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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