NULL Pointer Dereference Affecting qemu package, versions <1:6.2+dfsg-2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.38% (32nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321849
  • published27 Jul 2026
  • disclosed24 Aug 2022

Introduced: 24 Aug 2022

CVE-2021-4158  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 1:6.2+dfsg-2 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 issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

CVSS Base Scores

version 3.1