arch/arm64/kvm/guest.c in KVM in the Linux kernel before 4.18.12 on the arm64 platform mishandles the KVM_SET_ON_REG ioctl. This is exploitable by attackers who can create virtual machines. An attacker can arbitrarily redirect the hypervisor flow of control (with full register control). An attacker can also cause a denial of service (hypervisor panic) via an illegal exception return. This occurs because of insufficient restrictions on userspace access to the core register file, and because PSTATE.M validation does not prevent unintended execution modes.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2018-10-07T06:00:00

Updated: 2024-08-05T11:01:14.808Z

Reserved: 2018-10-07T00:00:00

Link: CVE-2018-18021

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-10-07T06:29:00.273

Modified: 2019-04-03T01:29:03.190

Link: CVE-2018-18021

cve-icon Redhat

Severity : Important

Publid Date: 2018-10-03T00:00:00Z

Links: CVE-2018-18021 - Bugzilla