CVE-2021-4095

2022-03-0814:05:00

CWE-476

redhat

www.cve.org

cve-2021-4095

linux kernel

kvm

dirty ring logging

unprivileged local attacker

denial of service

kvm_xen_hvm_set_attr

ioctl

version prior to 5.17-rc1

AI Score

5.7

Confidence

High

EPSS

Percentile

5.1%

JSON

A NULL pointer dereference was found in the Linux kernel’s KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Linux kernel versions prior to 5.17-rc1"
      }
    ]
  }
]