VULNERABILITY INTELLIGENCE

CVE-2019-14821

CVSS score8.8 HIGH
EPSS probability0.76%
CISA KEVNot currently listed
Published2019-09-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Description

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.

Weakness classification

  • secalert@redhat.com: CWE-787
  • nvd@nist.gov: CWE-787

Primary references