Use After Free Affecting kernel-tools package, versions <0:4.18.0-193.46.1.el8_2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.09% (41st percentile)

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  • Snyk ID SNYK-RHEL8-KERNELTOOLS-3888618
  • published 26 Jul 2021
  • disclosed 6 Nov 2020

How to fix?

Upgrade RHEL:8 kernel-tools to version 0:4.18.0-193.46.1.el8_2 or higher.
This issue was patched in RHSA-2021:0765.

NVD Description

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

A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Scores

version 3.1
Expand this section

NVD

7.8 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

Red Hat

7 high
Expand this section

SUSE

4.4 medium