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XENCVE-2023-46838

HistoryJan 29, 2024 - 11:15 a.m.

CVE-2023-46838

2024-01-2911:15:07

CWE-476

XEN

web.nvd.nist.gov

cve-2023-46838

xen

virtual network protocol

zero length

null dereference

core networking code

nvd

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.4

Confidence

High

EPSS

0.001

Percentile

18.8%

JSON

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.

Affected configurations

Nvd

Node

linuxlinux_kernelRange4.14–4.19.306

linuxlinux_kernelRange4.20–5.4.268

linuxlinux_kernelRange5.5–5.10.209

linuxlinux_kernelRange5.11–5.15.148

linuxlinux_kernelRange5.16–6.1.75

linuxlinux_kernelRange6.2–6.6.14

linuxlinux_kernelRange6.7–6.7.2

Node

fedoraprojectfedoraMatch38

fedoraprojectfedoraMatch39

Node

debiandebian_linuxMatch10.0

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
fedoraprojectfedora38cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
fedoraprojectfedora39cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
debiandebian_linux10.0cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
fedoraproject	fedora	38	cpe:2.3:o:fedoraproject:fedora:38:::::::*
fedoraproject	fedora	39	cpe:2.3:o:fedoraproject:fedora:39:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*

CNA Affected

[
  {
    "defaultStatus": "unknown",
    "product": "Linux",
    "vendor": "Linux",
    "versions": [
      {
        "status": "unknown",
        "version": "consult Xen advisory XSA-448"
      }
    ]
  }
]