7.5
High
CVE-2019-14821 An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| kernel | Versions not published |
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