CVE-2023-3255

Advisory lineage Upstream: 0 Downstream: 10
Modified
Published: 13 Sept 2023, 16:12
Last modified:08 Nov 2025, 06:30

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.12% LOW
0% probability -0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Sept 2023, 16:12
Published
Vulnerability first disclosed
08 Nov 2025, 06:30
Last Modified
Vulnerability information updated

Description

A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to 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

EPSS Trends

Current EPSS score: 0.12%• Percentile: 30%

Techniques & Countermeasures

  • CWE-835•Loop with Unreachable Exit Condition ('Infinite Loop')

    The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Systems

  • fedoraproject•fedora

    38

  • qemu•qemu

    ≤ 8.0.3

  • redhat•enterprise_linux

    8.0 | 9.0

References (5)