CVE-2021-22543

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 26-05-2021 01:15

Last modified: - 01-04-2022 08:45

Total changes: - 10

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.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Local

Attack vector

High

Availability

High

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

7.8

Base score

1.8

5.9

Exploitability score

Impact score

Verification logic

vendor=linux AND product=linux_kernel AND version=2021-05-18

vendor=fedoraproject AND product=fedora AND version=33

vendor=fedoraproject AND product=fedora AND version=34

vendor=Debian AND product=debian_linux AND version=9.0

AND

vendor=netapp AND product=baseboard_management_controller_h410c_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h410c AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h300s_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h300s AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h500s_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h500s AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h700s_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h700s AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h300e_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h300e AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h500e_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h500e AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h700e_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h700e AND version=-

AND

vendor=netapp AND product=baseboard_management_controller_h410s_firmware AND version=-

vendor=netapp AND product=baseboard_management_controller_h410s AND version=-

vendor=netapp AND product=cloud_backup AND version=-

vendor=netapp AND product=solidfire_baseboard_management_controller_firmware AND version=-

Reference

https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584
[oss-security] 20210626 Re: CVE-2021-22543 - /dev/kvm LPE-Mailing List
FEDORA-2021-95f2f1cfc7-Mailing List, Third Party Advisory
FEDORA-2021-fe826f202e-Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210708-0002/
[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update-Mailing List, Third Party Advisory
[debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update-Mailing List, Third Party Advisory

Keywords

CVE-2021-22543

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-22543

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures