CVE-2023-6683

MEDIUM

QEMU 6.1.0-8.2.1 - Authenticated Denial of Service via VNC ClientCutText Message

Title source: llm
STIX 2.1

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.

References (5)

Core 5
Core References
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:2135
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2024:2962
Third Party Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2023-6683
Issue Tracking, Patch issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2254825

Scores

CVSS v3 6.5
EPSS 0.0007
EPSS Percentile 20.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (3)
qemu/qemu 6.1.0 - 8.2.2
redhat/enterprise_linux 8.0
redhat/enterprise_linux 9.0
Published Jan 12, 2024
Tracked Since Feb 18, 2026