CVE-2023-46838

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

29/01/2024

Last modified:

04/11/2025

Description

Transmit requests in Xen&#39;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

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.14 (including)	4.19.306 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.268 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.209 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.148 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.75 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.14 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.7.2 (excluding)
cpe:2.3:o:fedoraproject:fedora:38:::::::*
cpe:2.3:o:fedoraproject:fedora:39:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2023-46838

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools