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Race Condition Affecting perf package, versions <0:4.18.0-193.13.2.el8_2

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.05% (21st percentile)

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  • Snyk ID SNYK-RHEL8-PERF-3769019
  • published 26 Jul 2021
  • disclosed 30 Jan 2020
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Introduced: 30 Jan 2020

CVE-2019-3016 Open this link in a new tab
CWE-362 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade RHEL:8 perf to version 0:4.18.0-193.13.2.el8_2 or higher.
This issue was patched in RHSA-2020:3010.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf 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.

References

CVSS Scores

version 3.1
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NVD

4.7 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    None
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Red Hat

2.5 low