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CVE-2024-40981

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: batman-adv: bypass empty buckets in batadv_purge_orig_ref() Many syzbot reports are pointing to soft lockups in batadv_purge_or…

Published Jul 12, 2024CWE-667EPSS 0.23%

Overview

CVE-2024-40981 is a medium-severity vulnerability. It was published on July 12, 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:

batman-adv: bypass empty buckets in batadv_purge_orig_ref()

Many syzbot reports are pointing to soft lockups in

batadv_purge_orig_ref() [1]

Root cause is unknown, but we can avoid spending too much

time there and perhaps get more interesting reports.

[1]

watchdog: BUG: soft lockup - CPU#0 stuck for 27s! [kworker/u4:6:621]

Modules linked in:

irq event stamp: 6182794

hardirqs last enabled at (6182793): [<ffff8000801dae10>] __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386

hardirqs last disabled at (6182794): [<ffff80008ad66a78>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]

hardirqs last disabled at (6182794): [<ffff80008ad66a78>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551

softirqs last enabled at (6182792): [<ffff80008aab71c4>] spin_unlock_bh include/linux/spinlock.h:396 [inline]

softirqs last enabled at (6182792): [<ffff80008aab71c4>] batadv_purge_orig_ref+0x114c/0x1228 net/

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/154e3f862ba33675cf3f4abf0a0a309a89df87d2Refgit.kernel.org/stable/c/2685008a5f9a636434a8508419cee8158a2f52c8Refgit.kernel.org/stable/c/40dc8ab605894acae1473e434944924a22cfaaa0Refgit.kernel.org/stable/c/79636f636126775436a11ee9cf00a9253a33ac11Refgit.kernel.org/stable/c/82cdea8f3af1e36543c937df963d108c60bea030Refgit.kernel.org/stable/c/92176caf9896572f00e741a93cecc0ef1172da07Refgit.kernel.org/stable/c/ae7f3cffe86aea3da0e8e079525a1ae619b8862aRefgit.kernel.org/stable/c/fed7914858a1f1f3e6350bb0f620d6ef15107d16Refgit.kernel.org/stable/c/154e3f862ba33675cf3f4abf0a0a309a89df87d2Refgit.kernel.org/stable/c/2685008a5f9a636434a8508419cee8158a2f52c8

How CyberStrike helps

Frequently asked questions

What is CVE-2024-40981?

CVE-2024-40981 is a medium-severity vulnerability. It was published on July 12, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-40981?

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-2024-40981?

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-2024-40981?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-40981 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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