CVE & CISA-KEV Catalog

CVE-2019-3887

MEDIUM
5.6
CVSS v3
NVD

Description

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

CWE-863Incorrect Authorization

How to fix

Remediation Available
linuxDebian
Fixed in:4.19.37-1CVE-2019-3887
Fixed in:4.19.37-1CVE-2019-3887
Fixed in:4.19.37-1CVE-2019-3887
Fixed in:4.19.37-1CVE-2019-3887
linux-azureUbuntu
Fixed in:4.18.0-1018.18~18.04.1USN-3980-2
linux-hweUbuntu
Fixed in:4.18.0-20.21~18.04.1USN-3980-2
linux-image-4.18.0-1018-azureUbuntu
Fixed in:4.18.0-1018.18~18.04.1USN-3980-2
linux-image-4.18.0-20-genericUbuntu
Fixed in:4.18.0-20.21~18.04.1USN-3980-2
linux-image-4.18.0-20-generic-lpaeUbuntu
Fixed in:4.18.0-20.21~18.04.1USN-3980-2
linux-image-4.18.0-20-lowlatencyUbuntu
Fixed in:4.18.0-20.21~18.04.1USN-3980-2
linux-image-4.18.0-20-snapdragonUbuntu
Fixed in:4.18.0-20.21~18.04.1USN-3980-2
linux-image-azureUbuntu
Fixed in:4.18.0.1018.17USN-3980-2
linux-image-generic-hwe-18.04Ubuntu
Fixed in:4.18.0.20.70USN-3980-2
linux-image-generic-lpae-hwe-18.04Ubuntu
Fixed in:4.18.0.20.70USN-3980-2
linux-image-lowlatency-hwe-18.04Ubuntu
Fixed in:4.18.0.20.70USN-3980-2
linux-image-snapdragon-hwe-18.04Ubuntu
Fixed in:4.18.0.20.70USN-3980-2
linux-image-virtual-hwe-18.04Ubuntu
Fixed in:4.18.0.20.70USN-3980-2

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeChanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Exploit Intelligence

0.36%probability of exploitation in 30 days
28thpercentile

Low risk: more likely to be exploited than 28% of all known CVEs.

References

Other references1

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-22518Critical9.8100%KEV + RansomFix
CVE-2023-38035Critical9.8100%KEV + Ransom-
CVE-2022-46169Critical9.8100%KEVFix
CVE-2025-29927Critical9.1100%-Fix
CVE-2024-38856Critical9.899%KEVFix
CVE-2020-36289Medium5.399%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.