CVE-2022-42314

Guest-triggered DoS via unbounded xenstored allocations

Published Nov 1, 2022 · Updated May 6, 2025

Allocation of resources without limits in Xen xenstored allows unprivileged guests to cause denial of service via crafted xenstore requests. Guests can withhold responses, create many watches or nodes, or access many nodes in transactions, causing xenstored to buffer or allocate excessive memory. The attack requires an unprivileged guest and can prevent creation of new guests or configuration changes to running guests.

CVSS severity6.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Allocation of resources without limits in Xen xenstored allows unprivileged guests to cause denial of service via crafted xenstore requests. Guests can withhold responses, create many watches or nodes, or access many nodes in transactions, causing xenstored to buffer or allocate excessive memory. The attack requires an unprivileged guest and can prevent creation of new guests or configuration changes to running guests.

The record

CVE
CVE-2022-42314
Published
Nov 1, 2022
Updated
May 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1499.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 1, 2022CVE publishedPublication date reported by the CVE source.
  2. May 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Service Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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