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CVE-2023-46838

7.5 · HIGH

Transmit requests in Xen's virtual network protocol can consist of multiple parts.

Published Jan 29, 2024CWE-476EPSS 1.18%

Overview

CVE-2023-46838 is a high-severity vulnerability. It was published on January 29, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Transmit requests in Xen's virtual network protocol can consist of

multiple parts. While not really useful, except for the initial part

any of them may be of zero length, i.e. carry no data at all. Besides a

certain initial portion of the to be transferred data, these parts are

directly translated into what Linux calls SKB fragments. Such converted

request parts can, when for a particular SKB they are all of length

zero, lead to a de-reference of NULL in core networking code.

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/2024/06/msg00016.htmlReflists.debian.org/debian-lts-announce/2024/06/msg00020.htmlReflists.fedoraproject.org/archives/list/[email protected]/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/Reflists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/Refxenbits.xenproject.org/xsa/advisory-448.htmlRefxenbits.xen.org/xsa/advisory-448.htmlReflists.debian.org/debian-lts-announce/2024/06/msg00016.htmlReflists.debian.org/debian-lts-announce/2024/06/msg00020.htmlReflists.fedoraproject.org/archives/list/[email protected]/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/Reflists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-46838?

CVE-2023-46838 is a high-severity vulnerability. It was published on January 29, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-46838?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-46838?

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-2023-46838?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-46838 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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