Out-of-bounds Write Affecting qemu package, versions <1:7.2+dfsg-7+deb12u4


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.33% (25th percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321871
  • published27 Jul 2026
  • disclosed2 Jan 2024

Introduced: 2 Jan 2024

CVE-2023-6693  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 1:7.2+dfsg-7+deb12u4 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 stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the out_sg variable could be used to read a part of process memory and send it to the wire, causing an information leak.

CVSS Base Scores

version 3.1