CVE-2022-23034

Name: CVE-2022-23034
Creator: NVD / NIST
Published: 2022-01-25T14:15:09.01+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2022-23034 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.34%

25.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-191

Affected Software

Vendor	Product	Versions
Xen	Xen	>= 3.2.0, < 4.13.0
Fedoraproject	Fedora	34
Debian	Debian Linux	9.0
Debian	Debian Linux	11.0

References

http://www.openwall.com/lists/oss-security/2022/01/25/3Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/
https://security.gentoo.org/glsa/202208-23Third Party Advisory
https://www.debian.org/security/2022/dsa-5117Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-394.txtPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/01/25/3Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/
https://security.gentoo.org/glsa/202208-23Third Party Advisory
https://www.debian.org/security/2022/dsa-5117Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-394.txtPatch, Vendor Advisory

Timeline

Published: Jan 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-23034?

How severe is CVE-2022-23034?

CVE-2022-23034 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23034?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-23034?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST