Loop with Unreachable Exit Condition ('Infinite Loop') Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-240.22.1.rt7.77.el8_3


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.06% (28th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUGKVM-3972686
  • published26 Jul 2021
  • disclosed2 Aug 2020

Introduced: 2 Aug 2020

CVE-2020-27152  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-debug-kvm to version 0:4.18.0-240.22.1.rt7.77.el8_3 or higher.
This issue was patched in RHSA-2021:1081.

NVD Description

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

An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.

CVSS Scores

version 3.1