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NULL Pointer Dereference Affecting kernel-rt-debug-modules-extra package, versions <0:4.18.0-348.rt7.130.el8

Severity

 Recommended
0.0
medium
0
10

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.05% (16th percentile)

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  • Snyk ID SNYK-CENTOS8-KERNELRTDEBUGMODULESEXTRA-2125342
  • published 26 Jul 2021
  • disclosed 22 Mar 2021
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Introduced: 22 Mar 2021

CVE-2021-28971 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Centos:8 kernel-rt-debug-modules-extra to version 0:4.18.0-348.rt7.130.el8 or higher.

NVD Description

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

In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS status in a PEBS record is mishandled, aka CID-d88d05a9e0b6.

References

CVSS Scores

version 3.1
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NVD

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

4.7 medium
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SUSE

5.1 medium