CVE-2022-42321: Medium severity XEN Xen vulnerability

Published Nov 1, 2022
·
Updated

Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.

Affected Software

6 affected componentsFixes available
debian/xen<=4.11.4+107-gef32c7afa2-1
4.14.6-14.14.5+94-ge49571868d-14.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-1
XEN Xen
Debian Debian Linux=11.0
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Fedoraproject Fedora=37

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/xen to a version that resolves this vulnerability.

    Fixed in 4.14.6-1Fixed in 4.14.5+94-ge49571868d-1Fixed in 4.17.1+2-gb773c48e36-1Fixed in 4.17.2+55-g0b56bed864-1

Event History

Nov 1, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness
Data Sourced
via NVD·01:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2022-42321?

The severity of CVE-2022-42321 is medium.

2

How can guests crash xenstored using CVE-2022-42321?

Guests can crash xenstored by exhausting the stack through recursion, specifically when deleting a sub-tree of Xenstore nodes.

3

Which versions of xen are affected by CVE-2022-42321?

Versions 4.14.6-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, and 4.17.2+55-g0b56bed864-1 are affected by CVE-2022-42321.

4

Which software packages are affected by CVE-2022-42321?

Debian Xen, Xen Xen, Debian Debian Linux, Fedoraproject Fedora 35, Fedoraproject Fedora 36, and Fedoraproject Fedora 37 are affected by CVE-2022-42321.

5

How can I fix CVE-2022-42321?

To fix CVE-2022-42321, update your Xen software to versions 4.14.6-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, or 4.17.2+55-g0b56bed864-1.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203