CVE-2022-42310

Guest-triggered denial of service via orphaned nodes

Published Nov 1, 2022 · Updated Aug 3, 2024

Incomplete cleanup in Xen 4.9 and later allows guest OS users to interrupt xenstored through a failing Xenstore transaction. Transaction rollback fails to remove every node created before an error, allowing a later commit to persist orphaned nodes without valid parents. Access from a malicious guest is required; resulting database inconsistencies can trigger unusual errors, memory leaks, denial of service, or lengthy xenstored recovery.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incomplete cleanup in Xen 4.9 and later allows guest OS users to interrupt xenstored through a failing Xenstore transaction. Transaction rollback fails to remove every node created before an error, allowing a later commit to persist orphaned nodes without valid parents. Access from a malicious guest is required; resulting database inconsistencies can trigger unusual errors, memory leaks, denial of service, or lengthy xenstored recovery.

The record

CVE
CVE-2022-42310
Published
Nov 1, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-459, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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

6.0SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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