CVE-2022-42309

Guest-triggered service crash via wrong pointer use

Published Nov 1, 2022 · Updated Aug 3, 2024

Invalid pointer use in C Xenstore in Xen allows guest OS users to crash xenstored through a controllable node-creation error path. During node creation, the C implementation's error handling uses the wrong pointer after a guest exceeds its per-domain node quota, corrupting memory or terminating xenstored. Only hosts running xenstored or xenstore-stubdom with the XSA-115 fix are affected; a crash blocks new guest creation and running-guest configuration changes.

CVSS severity8.8
High
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

Invalid pointer use in C Xenstore in Xen allows guest OS users to crash xenstored through a controllable node-creation error path. During node creation, the C implementation's error handling uses the wrong pointer after a guest exceeds its per-domain node quota, corrupting memory or terminating xenstored. Only hosts running xenstored or xenstore-stubdom with the XSA-115 fix are affected; a crash blocks new guest creation and running-guest configuration changes.

The record

CVE
CVE-2022-42309
Published
Nov 1, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-763, T1499
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

8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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-763Release of Invalid Pointer or Reference
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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