VulnerabilityModified
CVE-2019-3887
A guest could use this flaw to potentially crash the host kernel resulting in DoS issue.
MEDIUM 5.6EPSS 0.36%
Does this matter?
Lower severity and a low EPSS score (0.36%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.6 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
- EPSS
- 0.36% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- linux/linux kernel · fedoraproject/fedora · canonical/ubuntu linux · redhat/enterprise linux · redhat/enterprise linux eus · redhat/enterprise linux for real time · redhat/enterprise linux for real time for nfv · redhat/enterprise linux for real time for nfv tus · redhat/enterprise linux for real time tus · redhat/enterprise linux server aus · redhat/enterprise linux server tus
- Source
- secalert@redhat.com
References
- http://www.securityfocus.com/bid/107850Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:2703Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2741Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887Issue Tracking, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
- https://usn.ubuntu.com/3979-1/Third Party Advisory
- https://usn.ubuntu.com/3980-1/Third Party Advisory
- https://usn.ubuntu.com/3980-2/Third Party Advisory
- http://www.securityfocus.com/bid/107850Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:2703Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2741Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887Issue Tracking, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/
- https://usn.ubuntu.com/3979-1/Third Party Advisory
- https://usn.ubuntu.com/3980-1/Third Party Advisory
- https://usn.ubuntu.com/3980-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.