CWE Code: 787
Vulnerability Type: privilege_escalation
CVSS Score: 7.2
CWE Name:  Out-of-bounds Write
Summary: 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.
Access Authentication: NONE
Access Complexity: LOW
Access Vector: LOCAL
Impact (C/I/A): COMPLETE/COMPLETE/COMPLETE
Published Date: 2019-09-19
Last Modified Date: 2019-09-24