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Oracle Linux: (CVE-2019-3887) ELSA-2019-2703: kernel security and bug fix update

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Oracle Linux: (CVE-2019-3887) ELSA-2019-2703: kernel security and bug fix update

Severity
5
CVSS
(AV:L/AC:M/Au:N/C:N/I:N/A:C)
Published
04/09/2019
Created
07/23/2020
Added
07/21/2020
Modified
11/23/2022

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.

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • ELSA-2019-2703
  • USN-3979-1
  • USN-3980-1
  • USN-3980-2
  • CVE-2019-3887

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