CVE-2021-22543

CVE Details

Release Date:

2021-05-26

Description

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

See more information about CVE-2021-22543 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.8	Base Metrics:	AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel)	ELSA-2021-3801	2021-10-12
Oracle Linux version 7 (kernel-uek)	ELSA-2021-9450	2021-09-16
Oracle Linux version 7 (kernel-uek)	ELSA-2021-9452	2021-09-21
Oracle Linux version 7 (kernel-uek-container)	ELSA-2021-9451	2021-09-16
Oracle Linux version 7 (kernel-uek-container)	ELSA-2021-9453	2021-09-21
Oracle Linux version 8 (kernel)	ELSA-2021-3057	2021-08-11
Oracle Linux version 8 (kernel-uek)	ELSA-2021-9450	2021-09-16
Oracle Linux version 8 (kernel-uek-container)	ELSA-2021-9451	2021-09-16

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team