Loop with Unreachable Exit Condition ('Infinite Loop') Affecting qemu package, versions <1:5.2+dfsg-9


0.0
medium

Snyk CVSS

    Attack Complexity Low
    Privileges Required High
    Scope Changed
    Availability High

    Threat Intelligence

    EPSS 0.05% (17th percentile)
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NVD
6 medium
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SUSE
3.2 low
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Red Hat
3.2 low

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  • Snyk ID SNYK-DEBIAN12-QEMU-1558187
  • published 26 Feb 2021
  • disclosed 18 Mar 2021

How to fix?

Upgrade Debian:12 qemu to version 1:5.2+dfsg-9 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:12 relevant fixed versions and status.

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.