CVE-2023-46838 - CVE House
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Status published Unknown CVE-2023-46838

Linux: netback processing of zero-length transmit fragment

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • This issue was discovered by Pratyush Yadav of Amazon.

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
consult Xen advisory XSA-448

Timeline

Official Publish: January 29th, 2024
Last Modified: November 4th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.