CVE-2023-6683
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Qemu
PublishedJan 12, 2024
First seenJan 12, 2024
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- qemu qemu8.2.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qemu qemu | 6.1.0 ≤ v < 8.2.2 | 8.2.2 |
| redhat enterprise_linux | 8.0, 9.0 | — |
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