Race Condition Affecting qemu package, versions <1:7.2+dfsg-7+deb12u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321867
  • published27 Jul 2026
  • disclosed13 Sept 2023

Introduced: 13 Sep 2023

CVE-2023-3301  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 1:7.2+dfsg-7+deb12u1 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 flaw was found in QEMU. The async nature of hot-unplug enables a race scenario where the net device backend is cleared before the virtio-net pci frontend has been unplugged. A malicious guest could use this time window to trigger an assertion and cause a denial of service.

CVSS Base Scores

version 3.1