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CVE-2023-34324

4.9 · MEDIUM

Closing of an event channel in the Linux kernel can result in a deadlock.

Published Jan 5, 2024CWE-400EPSS 1.15%

Overview

CVE-2023-34324 is a medium-severity vulnerability. It was published on January 5, 2024 and has a CVSS 3.1 base score of 4.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.9, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Closing of an event channel in the Linux kernel can result in a deadlock.

This happens when the close is being performed in parallel to an unrelated

Xen console action and the handling of a Xen console interrupt in an

unprivileged guest.

The closing of an event channel is e.g. triggered by removal of a

paravirtual device on the other side. As this action will cause console

messages to be issued on the other side quite often, the chance of

triggering the deadlock is not neglectable.

Note that 32-bit Arm-guests are not affected, as the 32-bit Linux kernel

on Arm doesn't use queued-RW-locks, which are required to trigger the

issue (on Arm32 a waiting writer doesn't block further readers to get

the lock).

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

Reflists.debian.org/debian-lts-announce/2024/01/msg00004.htmlReflists.debian.org/debian-lts-announce/2024/01/msg00005.htmlRefxenbits.xenproject.org/xsa/advisory-441.htmlRefxenbits.xen.org/xsa/advisory-441.htmlReflists.debian.org/debian-lts-announce/2024/01/msg00004.htmlReflists.debian.org/debian-lts-announce/2024/01/msg00005.htmlRefxenbits.xenproject.org/xsa/advisory-441.html

How CyberStrike helps

Frequently asked questions

What is CVE-2023-34324?

CVE-2023-34324 is a medium-severity vulnerability. It was published on January 5, 2024 and has a CVSS 3.1 base score of 4.9 (MEDIUM).

How severe is CVE-2023-34324?

This vulnerability has a CVSS 3.1 base score of 4.9, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-34324?

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-2023-34324?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-34324 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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