CVE-2023-3255

MediumCVSS 6.5/10Last modified Nov 7, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 8	—
Red Hat	Red Hat Enterprise Linux 8	—
Red Hat	Red Hat Enterprise Linux 9	—
Red Hat	Red Hat Enterprise Linux 6	—
Red Hat	Red Hat Enterprise Linux 7	—
Red Hat	Red Hat Enterprise Linux 7	—
Red Hat	Red Hat Enterprise Linux 8 Advanced Virtualization	—

References

https://access.redhat.com/errata/RHSA-2024:2135
https://access.redhat.com/errata/RHSA-2024:2962
https://access.redhat.com/security/cve/CVE-2023-3255Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2218486Issue Tracking, Patch, Third Party Advisory
https://access.redhat.com/errata/RHSA-2024:2135
https://access.redhat.com/errata/RHSA-2024:2962
https://access.redhat.com/security/cve/CVE-2023-3255Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2218486Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20231020-0008/

Timeline

Published: Sep 13, 2023
Last modified: Nov 7, 2026
NVD status: Modified

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