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[email protected]CVE-2022-33748

HistoryOct 11, 2022 - 1:15 p.m.

CVE-2022-33748

2022-10-1113:15:10

CWE-755

[email protected]

web.nvd.nist.gov

cve-2022-33748

lock order inversion

transitive grant copy handling

xsa-226

nvd

security

cpu locking

5.6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.1 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

14.3%

JSON

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.

Affected configurations

NVD

Node

xenxenRange4.0≥

Node

fedoraprojectfedoraMatch35

fedoraprojectfedoraMatch36

fedoraprojectfedoraMatch37

Node

debiandebian_linuxMatch11.0

CPENameOperatorVersion
xen:xenxeneq*

CPE	Name	Operator	Version
xen:xen	xen	eq	*

CNA Affected

[
  {
    "vendor": "Xen",
    "product": "xen",
    "versions": [
      {
        "version": "consult Xen advisory XSA-411",
        "status": "unknown"
      }
    ]
  }
]