CVE catalog
CVE-2023-6683
qemu: CVE-2023-6683
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.26% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | qemu | sid | 1:11.1.2+ds-3 | fixed |
| Debian | qemu | forky | 1:11.1.2+ds-3 | fixed |
| Debian | qemu | trixie | 1:10.0.13+ds-0+deb13u1 | fixed |
| Debian | qemu | trixie-security | 1:10.0.2+ds-2+deb13u1 | fixed |
| Debian | qemu | bookworm | 1:7.2+dfsg-7+deb12u18 | fixed |
| Debian | qemu | bookworm-security | 1:7.2+dfsg-7+deb12u15 | fixed |
| Ubuntu | qemu | 22.04 | 1:6.0+dfsg-2expubuntu1 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.0+dfsg-2expubuntu2 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.0+dfsg-2expubuntu4 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu5 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.1 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.2 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.3 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.4 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.5 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.6 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.7 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.8 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.9 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.10 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.11 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.12 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.13 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.14 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.15 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.16 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.17 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.18 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.19 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.21 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.22 | fixed |
| Ubuntu | qemu | 22.04 | 1:6.0+dfsg-2expubuntu1 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.0+dfsg-2expubuntu2 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.0+dfsg-2expubuntu4 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu5 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.1 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.2 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.3 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.4 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.5 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.6 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.7 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.8 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.9 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.10 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.11 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.12 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.13 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.14 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.15 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.16 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.17 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.18 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.19 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.21 | vulnerable |
| Ubuntu | qemu | 22.04 | 1:6.2+dfsg-2ubuntu6.22 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | qemu | source | sid | 1:8.2.0+ds-5 | not yet assigned | Not reported | [1060749] |
| Debian | qemu | source | forky | 1:8.2.0+ds-5 | not yet assigned | Not reported | [1060749] |
| Debian | qemu | source | trixie | 1:8.2.0+ds-5 | not yet assigned | Not reported | [1060749] |
| Debian | qemu | source | bookworm | 1:7.2+dfsg-7+deb12u4 | not yet assigned | Not reported | [1060749] |
| Ubuntu | qemu | deb | 22.04 | 1:6.2+dfsg-2ubuntu6.22 | Not reported | USN-6954-1 | Not reported |
| Ubuntu | qemu | deb | 22.04 | 1:6.2+dfsg-2ubuntu6.22 | Not reported | UBUNTU-CVE-2023-6683 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://ftp.suse.com/pub/projects/security/csaf/essa-2024_0485.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-6683]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-6683]
- [https://osv.dev/vulnerability/USN-6954-1]
- [https://security-tracker.debian.org/tracker/CVE-2023-6683]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-6683.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0079.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]