CVE-2022-3165
QEMU: VNC: integer underflow in vnc_client_cut_text_ext leads to CPU exhaustion
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2022
Updated · June 28, 2026
Description
An integer underflow issue was found in the QEMU built-in VNC server while processing ClientCutText messages in the extended format. A malicious client could use this flaw to make QEMU unresponsive by sending a specially crafted payload message, resulting in a denial of service.
Statement
Red Hat Enterprise Linux 6, 7 and RHEL Advanced Virtualization are not affected by this flaw as they did not include support for the extended clipboard pseudo-encoding (upstream commit 0bf41cab).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-191 · Integer Underflow (Wrap or Wraparound)