Use After Free Affecting kernel-debug-modules-extra package, versions <0:4.18.0-240.15.1.el8_3


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.09% (41st percentile)

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  • Snyk ID SNYK-CENTOS8-KERNELDEBUGMODULESEXTRA-2088912
  • published 26 Jul 2021
  • disclosed 6 Nov 2020

How to fix?

Upgrade Centos:8 kernel-debug-modules-extra to version 0:4.18.0-240.15.1.el8_3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules-extra package and not the kernel-debug-modules-extra package as distributed by Centos. See How to fix? for Centos: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
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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
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Red Hat

7 high
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SUSE

4.4 medium