🛡️ CVE-2023-6693
🟡 CVSS 4.9 — Medium ✅ No Known Exploit CWE-121 NVD
4.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity MEDIUM
CVSS Score 4.9
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE CWE-121
Public Exploit ✅ No
Source NVD
Published 2024-01-02
Updated 2026-06-08
Modified 2025-11-03

Affected Packages

Software From version Fixed in
enterprise-linux
fedora
qemu 8.2.1

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