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LIN1021-390 : Security Advisory - linux - CVE-2021-22543

Created: May 26, 2021    Updated: Jul 15, 2021
Resolved Date: Jul 12, 2021
Found In Version: 10.21.20.1
Fix Version: 10.21.20.1
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Kernel

Description

An issue was discovered in the 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.

CREATE(Triage):(User=admin) [CVE-2021-22543|https://nvd.nist.gov/vuln/detail/CVE-2021-22543]

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