CVE-2022-33748

Name: CVE-2022-33748
Creator: NVD / NIST
Published: 2022-10-11T13:15:10.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.6/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2022-33748 is a medium-severity vulnerability rated 5.6/10 on the CVSS scale. lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.

Metrics

CVSS 3.1

5.6/10

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

EPSS Probability

0.25%

15.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-755

Affected Software

Vendor	Product	Versions
Xen	Xen	>= 4.0
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36
Fedoraproject	Fedora	37
Debian	Debian Linux	11.0

References

http://www.openwall.com/lists/oss-security/2022/10/11/2Mailing List, Mitigation, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-411.htmlMitigation, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWSC77GS5NATI3TT7FMVPULUPXR635XQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://security.gentoo.org/glsa/202402-07
https://www.debian.org/security/2022/dsa-5272Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-411.txtMitigation, Patch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/10/11/2Mailing List, Mitigation, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-411.htmlMitigation, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWSC77GS5NATI3TT7FMVPULUPXR635XQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://security.gentoo.org/glsa/202402-07
https://www.debian.org/security/2022/dsa-5272Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-411.txtMitigation, Patch, Vendor Advisory

Timeline

Published: Oct 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33748?

How severe is CVE-2022-33748?

CVE-2022-33748 has a CVSS score of 5.6/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33748?

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-2022-33748?

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

Scan your code now

Source: NVD / NIST