CVE-2023-46838

Advisory lineage Upstream: 0 Downstream: 30
Modified
Published: 29 Jan 2024, 10:18
Last modified:04 Nov 2025, 18:18

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.22% LOW
0% probability +0.10%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

29 Jan 2024, 10:18
Published
Vulnerability first disclosed
04 Nov 2025, 18:18
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.22%• Percentile: 45%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    38 | 39

  • linux•linux_kernel

    ≥ 4.14, < 4.19.306 | ≥ 4.20, < 5.4.268 | ≥ 5.5, < 5.10.209 | ≥ 5.11, < 5.15.148 | ≥ 5.16, < 6.1.75 | ≥ 6.2, < 6.6.14 | ≥ 6.7, < 6.7.2

References (6)