CVE-2022-33748

MEDIUM

Xen >= 4.0 - Denial of Service via Lock Order Inversion in Transitive Grant Copy Handling

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Mailing List, Mitigation, Patch, Third Party Advisory mailing-list
http://www.openwall.com/lists/oss-security/2022/10/11/2
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5272
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202402-07
Mitigation, Patch, Vendor Advisory
http://xenbits.xen.org/xsa/advisory-411.html
Mitigation, Patch, Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-411.txt

Scores

CVSS v3 5.6
EPSS 0.0025
EPSS Percentile 15.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Details

CWE
CWE-755
Status published
Products (5)
debian/debian_linux 11.0
fedoraproject/fedora 35
fedoraproject/fedora 36
fedoraproject/fedora 37
xen/xen 4.0
Published Oct 11, 2022
Tracked Since Feb 18, 2026