Race Condition Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-193.13.2.rt13.65.el8_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (22nd percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUGKVM-3773862
  • published26 Jul 2021
  • disclosed30 Jan 2020

Introduced: 30 Jan 2020

CVE-2019-3016  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-debug-kvm to version 0:4.18.0-193.13.2.rt13.65.el8_2 or higher.
This issue was patched in RHSA-2020:3016.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 Scores

version 3.1