CVE catalog
CVE-2018-6307
libvncserver: CVE-2018-6307
- Severity
- Critical · CVSS 9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 26.54% · Oct 27, 2026
LibVNC before commit ca2a5ac02fbbadd0a21fabba779c1ea69173d10b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution.
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 | libvncserver | sid | 0.9.15+dfsg-6 | fixed |
| Debian | libvncserver | forky | 0.9.15+dfsg-6 | fixed |
| Debian | libvncserver | trixie | 0.9.15+dfsg-1+deb13u2 | fixed |
| Debian | libvncserver | bookworm | 0.9.14+dfsg-1+deb12u2 | fixed |
| Ubuntu | libvncserver | 14.04 | 0.9.9+dfsg-1 | vulnerable |
| Ubuntu | libvncserver | 14.04 | 0.9.9+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | libvncserver | 14.04 | 0.9.9+dfsg-1ubuntu1.1 | vulnerable |
| Ubuntu | libvncserver | 14.04 | 0.9.9+dfsg-1ubuntu1.2 | vulnerable |
| Ubuntu | libvncserver | 14.04 | 0.9.9+dfsg-1ubuntu1.3 | vulnerable |
| Ubuntu | libvncserver | 14.04 | 0.9.9+dfsg-1ubuntu1.4 | fixed |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3build1 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.1 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.2 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.3 | fixed |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1 | vulnerable |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1ubuntu1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libvncserver | source | sid | 0.9.11+dfsg-1.2 | not yet assigned | Not reported | [916941] |
| Debian | libvncserver | source | forky | 0.9.11+dfsg-1.2 | not yet assigned | Not reported | [916941] |
| Debian | libvncserver | source | trixie | 0.9.11+dfsg-1.2 | not yet assigned | Not reported | [916941] |
| Debian | libvncserver | source | bookworm | 0.9.11+dfsg-1.2 | not yet assigned | Not reported | [916941] |
| Ubuntu | libvncserver | deb | 14.04 | 0.9.9+dfsg-1ubuntu1.4 | Not reported | UBUNTU-CVE-2018-6307 | Not reported |
| Ubuntu | libvncserver | deb | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.3 | Not reported | UBUNTU-CVE-2018-6307 | Not reported |
| Ubuntu | libvncserver | deb | 18.04 | 0.9.11+dfsg-1ubuntu1.1 | Not reported | UBUNTU-CVE-2018-6307 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[Debian 13 (Trixie)]
- [libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · 13
- [libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · 13
- [libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.11+dfsg-1.2dsa · libvncserver · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-6307]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-6307]
- [https://security-tracker.debian.org/tracker/CVE-2018-6307]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-6307.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]