QwikSec

Security Database

CVE

CWE

Training

CVE-2021-22543

Published: May 26, 2021

Modified: Sep 16, 2024

PUBLISHED

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.

Vendor	Product	Versions
Linux Kernel	Linux Kernel	affected `add6a0cd1c5ba51b201e1361b05a5df817083618 - < f8be156be163a052a067306417cd0ff679068c97`

Weaknesses (CWE)

References

https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584

x_refsource_MISC

[oss-security] 20210626 Re: CVE-2021-22543 - /dev/kvm LPE

mailing-list

x_refsource_MLIST

FEDORA-2021-fe826f202e

vendor-advisory

x_refsource_FEDORA

FEDORA-2021-95f2f1cfc7

vendor-advisory

x_refsource_FEDORA

https://security.netapp.com/advisory/ntap-20210708-0002/

x_refsource_CONFIRM

[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update

mailing-list

x_refsource_MLIST

[debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update

mailing-list

x_refsource_MLIST

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.