UBUNTU-CVE-2023-6683

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2023-6683
Downstream
USN-6954-1
Published: 12 Jan 2024, 19:15
Last modified:04 Feb 2026, 03:33

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Jan 2024, 19:15
Published
Vulnerability first disclosed
04 Feb 2026, 03:33
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•qemu

    < 1:6.2+dfsg-2ubuntu6.22

References (5)