VULNERABILITY INTELLIGENCE

CVE-2023-6683

CVSS score6.5 MEDIUM
EPSS probability1.26%
CISA KEVNot currently listed
Published2024-01-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.

Weakness classification

  • secalert@redhat.com: CWE-476
  • nvd@nist.gov: CWE-476

Primary references