CVE-2024-43914

5.5 · MEDIUM

Published Aug 26, 2024 linux EPSS 0.23% (13th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-43914 is a medium-severity vulnerability affecting linux linux_kernel. It was published on August 26, 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:

md/raid5: avoid BUG_ON() while continue reshape after reassembling

Currently, mdadm support --revert-reshape to abort the reshape while

reassembling, as the test 07revert-grow. However, following BUG_ON()

can be triggerred by the test:

kernel BUG at drivers/md/raid5.c:6278!

invalid opcode: 0000 [#1] PREEMPT SMP PTI

irq event stamp: 158985

CPU: 6 PID: 891 Comm: md0_reshape Not tainted 6.9.0-03335-g7592a0b0049a #94

RIP: 0010:reshape_request+0x3f1/0xe60

Call Trace:

<TASK>

raid5_sync_request+0x43d/0x550

md_do_sync+0xb7a/0x2110

md_thread+0x294/0x2b0

kthread+0x147/0x1c0

ret_from_fork+0x59/0x70

ret_from_fork_asm+0x1a/0x30

</TASK>

Root cause is that --revert-reshape update the raid_disks from 5 to 4,

while reshape position is still set, and after reassembling the array,

reshape position will be read from super block, then during reshape the

checking of 'writepos' that is caculated by old reshape position will

fail.

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	>= 0, < 4.19.320	Affected

References

Frequently Asked Questions

What is CVE-2024-43914?

CVE-2024-43914 is a medium-severity vulnerability affecting linux linux_kernel. It was published on August 26, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-43914?

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-2024-43914?

How can CyberStrike help with CVE-2024-43914?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-43914 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.

How CyberStrike Helps

Autonomous Discovery

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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