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prionPRIOn knowledge basePRION:CVE-2019-14821
HistorySep 19, 2019 - 6:15 p.m.

Design/Logic Flaw

2019-09-1918:15:00
PRIOn knowledge base
www.prio-n.com
6

8.2 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

30.3%

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.

References