VULNERABILITY INTELLIGENCE

CVE-2023-6693

CVSS score4.9 MEDIUM
EPSS probability0.33%
CISA KEVNot currently listed
Published2024-01-02
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Weakness classification

  • secalert@redhat.com: CWE-121
  • nvd@nist.gov: CWE-787

Primary references