PT-2022-7328

CVE-2022-42316

Published

2022-11-01

Updated

2026-10-31

Description by

CVSS 3.1

6.5

Medium

MetricsAV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Xenstore (affected versions not specified)

Description The issue is related to the uncontrolled allocation of resources in Xenstore, which can lead to a Denial of Service (DoS) of xenstored. Malicious guests can cause xenstored to allocate large amounts of memory through various methods, including:

issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory
causing a large number of watch events to be generated via setting up multiple xenstore watches and then deleting many xenstore nodes below the watched path
creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible
accessing many nodes inside a transaction.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Impacts

Researchers

Julien Grall

Vendors

Affected products

Weakness enumeration

CWE-770: Allocation of Resources Without Limits or Throttling

Related identifiers

CVE-2022-42316

BDU:2024-03584

CLEANSTART-2024-DW35079