UBUNTU-CVE-2019-3016

Description

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Systems

• ubuntu•linux-aws-5.0

  < 5.0.0-1027.30

• ubuntu•linux-azure

  < 5.0.0-1035.37

• ubuntu•linux-azure-5.3

  < 5.3.0-1016.17~18.04.1

• ubuntu•linux-azure-edge

  all

• ubuntu•linux-azure-fde

  all

• ubuntu•linux-gcp

  < 5.0.0-1033.34

• ubuntu•linux-gcp-5.3

  < 5.3.0-1014.15~18.04.1

• ubuntu•linux-gcp-edge

  all

• ubuntu•linux-gke

  all

• ubuntu•linux-gke-5.0

  < 5.0.0-1032.33

• ubuntu•linux-gke-5.3

  < 5.3.0-1014.15~18.04.1

• ubuntu•linux-gkeop

  all

• ubuntu•linux-gkeop-5.15

  all

• ubuntu•linux-hwe

  < 5.3.0-42.34~18.04.1

• ubuntu•linux-hwe-edge

  all | all

• ubuntu•linux-intel-iot-realtime

  all

• ubuntu•linux-oem-osp1

  < 5.0.0-1043.48

• ubuntu•linux-oracle-5.0

  < 5.0.0-1013.18

• ubuntu•linux-raspi-realtime

  all

• ubuntu•linux-raspi2

  all

• ubuntu•linux-raspi2-5.3

  < 5.3.0-1019.21~18.04.1

• ubuntu•linux-realtime

  all

• ubuntu•linux-riscv

  all | all

References (5)

• https://ubuntu.com/security/CVE-2019-3016
• https://ubuntu.com/security/notices/USN-4300-1
• https://ubuntu.com/security/notices/USN-4301-1
• https://usn.ubuntu.com/lsn/0065-1/
• https://www.cve.org/CVERecord?id=CVE-2019-3016