K01217337 : Linux kernel vulnerability CVE-2021-22543

Security Advisory 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. (CVE-2021-22543)

Impact

An attacker may be able to exploit this vulnerability to read or modify sensitive data or escalate privileges.