NULL Pointer Dereference Affecting qemu package, versions <1:6.0+dfsg-3


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.32% (23rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321993
  • published27 Jul 2026
  • disclosed28 May 2021

Introduced: 28 May 2021

CVE-2020-35505  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 1:6.0+dfsg-3 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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS Base Scores

version 3.1