CVE-2022-42310

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-11-01 · updated 2026-06-17
Weakness: CWE-459

Description

Xenstore: Guests can create orphaned Xenstore nodes By creating multiple nodes inside a transaction resulting in an error, a malicious guest can create orphaned nodes in the Xenstore data base, as the cleanup after the error will not remove all nodes already created. When the transaction is committed after this situation, nodes without a valid parent can be made permanent in the data base.

Affected products

Debian Linux: 11.0
Fedoraproject Fedora: 35, 36, 37
xen: from 4.9.0 before 4.13.0 — fixed in 4.13.0

How to fix

Upgrade to a fixed version: xen 4.13.0. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2022/11/01/5
http://xenbits.xen.org/xsa/advisory-415.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
https://security.gentoo.org/glsa/202402-07
https://www.debian.org/security/2022/dsa-5272
https://xenbits.xenproject.org/xsa/advisory-415.txt
http://www.openwall.com/lists/oss-security/2022/11/01/5
http://xenbits.xen.org/xsa/advisory-415.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/

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