Loop with Unreachable Exit Condition ('Infinite Loop') Affecting qemu package, versions <1:8.1.0+ds-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-DEBIAN13-QEMU-5693939
  • published22 Feb 2021
  • disclosed9 Mar 2021

Introduced: 22 Feb 2021

CVE-2021-20255  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Debian:13 qemu to version 1:8.1.0+ds-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS Scores

version 3.1