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CVE-2021-43056 Affecting kernel-tools package, versions <0:4.18.0-372.9.1.el8

Severity

 Recommended
high

Based on Rocky Linux security rating

    Threat Intelligence

    EPSS
    0.05% (16th percentile)

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  • Snyk ID SNYK-ROCKY8-KERNELTOOLS-3194290
  • published 5 Jan 2023
  • disclosed 28 Oct 2021
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Introduced: 28 Oct 2021

CVE-2021-43056 Open this link in a new tab

How to fix?

Upgrade Rocky-Linux:8 kernel-tools to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RLSA-2022:1988.

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 Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

An issue was discovered in the Linux kernel for powerpc before 5.14.15. It allows a malicious KVM guest to crash the host, when the host is running on Power8, due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values.

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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SUSE

6.8 medium
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Red Hat

5.5 medium