Vulnerability Details : CVE-2018-18021

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.
Published 2018-10-07 06:29:00
Updated 2019-04-03 01:29:03
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Exploit prediction scoring system (EPSS) score for CVE-2018-18021

EPSS FAQ
0.07%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-18021

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.6
 LOW AV:L/AC:L/Au:N/C:N/I:P/A:P
3.9
4.9
 NIST
7.1
 HIGH CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
1.8
5.2
 NIST

CWE ids for CVE-2018-18021

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-18021

Products affected by CVE-2018-18021

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