Out-of-Bounds Affecting qemu package, versions <1:7.1+dfsg-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.49% (38th percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321826
  • published27 Jul 2026
  • disclosed6 May 2021

Introduced: 6 May 2021

CVE-2021-3507  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 1:7.1+dfsg-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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

CVSS Base Scores

version 3.1