CVE-2022-42313

Guest-triggered service interruption via incorrect node accounting

Published Nov 1, 2022 · Updated May 6, 2025

Resource exhaustion in xenstored in Xen allows guest OS users to interrupt the service by forcing excessive memory allocation. C xenstored incorrectly accounts per-domain nodes, allowing transaction activity to evade intended node quotas and consume unbounded memory. An unprivileged guest can exhaust xenstored and prevent new guest creation 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

Resource exhaustion in xenstored in Xen allows guest OS users to interrupt the service by forcing excessive memory allocation. C xenstored incorrectly accounts per-domain nodes, allowing transaction activity to evade intended node quotas and consume unbounded memory. An unprivileged guest can exhaust xenstored and prevent new guest creation or configuration changes to running guests.

The record

CVE
CVE-2022-42313
Published
Nov 1, 2022
Updated
May 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1499
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

6.5CISA ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
6.5NIST NVDCVSS: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
T1499Endpoint Denial of Service

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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