CVE catalog
CVE-2023-3354
qemu: CVE-2023-3354
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.61% · Oct 25, 2026
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause 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 | pro | 1:2.10+dfsg-0ubuntu3 | vulnerable |
| Ubuntu | qemu | pro | 1:2.10+dfsg-0ubuntu4 | vulnerable |
| Ubuntu | qemu | pro | 1:2.10+dfsg-0ubuntu5 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu2 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu4 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu5 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu6 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.1 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.2 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.3 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.4 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.5 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.6 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.7 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.8 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.9 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.10 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.12 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.13 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.14 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.15 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.17 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.18 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.19 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.20 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.21 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.22 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.23 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.25 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.26 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.27 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.28 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.29 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.31 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.32 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.33 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.34 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.35 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.36 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.37 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.38 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.39 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.40 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.41 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.42 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.42+esm1 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.42+esm2 | vulnerable |
| Ubuntu | qemu | pro | 1:2.11+dfsg-1ubuntu7.42+esm5 | fixed |
| Ubuntu | qemu | 20.04 | 1:4.0+dfsg-0ubuntu9 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.0+dfsg-0ubuntu10 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-1ubuntu1 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-1ubuntu2 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu1 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu2 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu3 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu4 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu5 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.1 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.2 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.3 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.4 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.5 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.6 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.7 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.8 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.9 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.10 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.11 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.12 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.14 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.15 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.16 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.17 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.18 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.19 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.21 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.23 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.24 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.25 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.26 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.27 | vulnerable |
| Ubuntu | qemu | 20.04 | 1:4.2-3ubuntu6.28 | 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 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | qemu | source | sid | 1:8.0.4+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | qemu | source | forky | 1:8.0.4+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | qemu | source | trixie | 1:8.0.4+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | qemu | source | bookworm | 1:7.2+dfsg-7+deb12u2 | not yet assigned | Not reported | Not reported |
| Ubuntu | qemu | deb | pro | 1:2.11+dfsg-1ubuntu7.42+esm5 | Not reported | UBUNTU-CVE-2023-3354 | Not reported |
| Ubuntu | qemu | deb | 20.04 | 1:4.2-3ubuntu6.28 | Not reported | UBUNTU-CVE-2023-3354 | Not reported |
| Ubuntu | qemu | deb | 22.04 | 1:6.2+dfsg-2ubuntu6.16 | Not reported | UBUNTU-CVE-2023-3354 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://ftp.suse.com/pub/projects/security/csaf/essa-2023_0374.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-3354]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-3354]
- [https://security-tracker.debian.org/tracker/CVE-2023-3354]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-3354.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-1709.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]