CVE-2023-6683
Qemu: vnc: null pointer dereference in qemu_clipboard_request()
- State
- Published
- Severity
- 6.5 Medium
- Published
- Jan 12, 2024
- Updated
- Feb 25, 2026
- Reserved
- Dec 11, 2023
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 8Red Hat |
|
Red Hat Enterprise Linux 8Red Hat |
|
Red Hat Enterprise Linux 9Red Hat |
|
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8 Advanced VirtualizationRed Hat |
References
- RHSA-2024:2135vendor-advisory
- RHSA-2024:2962vendor-advisory
- https://access.redhat.com/security/cve/CVE-2023-6683vdb-entry
- RHBZ#2254825issue-tracking
- https://security.netapp.com/advisory/ntap-20240223-0001/
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