CVE catalog

CVE-2016-9942

libvncserver: CVE-2016-9942

Severity: Critical · CVSS 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Nov 14, 2016, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.82% · Oct 27, 2026

Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.

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	veyon	sid	`4.9.7+repack1-1.1`	fixed
Debian	veyon	trixie	`4.9.5+repack1-2`	fixed
Debian	veyon	bookworm	`4.7.5+repack1-1`	fixed
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
Alpine	libvncserver	3.10	`0.9.11-r0`	fixed
Alpine	libvncserver	3.11	`0.9.11-r0`	fixed
Alpine	libvncserver	3.2	`0.9.10-r2`	fixed
Alpine	libvncserver	3.3	`0.9.10-r2`	fixed
Alpine	libvncserver	3.4	`0.9.10-r2`	fixed
Alpine	libvncserver	3.5	`0.9.10-r2`	fixed
Alpine	libvncserver	3.6	`0.9.11-r0`	fixed
Alpine	libvncserver	3.7	`0.9.11-r0`	fixed
Alpine	libvncserver	3.8	`0.9.11-r0`	fixed
Alpine	libvncserver	3.9	`0.9.11-r0`	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`	fixed
Ubuntu	italc	16.04	`1:2.0.2+dfsg1-3`	vulnerable
Ubuntu	italc	16.04	`1:2.0.2+dfsg1-4`	vulnerable
Ubuntu	italc	16.04	`1:2.0.2+dfsg1-4ubuntu0.1`	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`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	veyon	source	sid	`4.1.4+repack1-1`	not yet assigned	Not reported	Not reported
Debian	veyon	source	trixie	`4.1.4+repack1-1`	not yet assigned	Not reported	Not reported
Debian	veyon	source	bookworm	`4.1.4+repack1-1`	not yet assigned	Not reported	Not reported
Debian	libvncserver	source	sid	`0.9.11+dfsg-1`	not yet assigned	Not reported	[850008]
Debian	libvncserver	source	forky	`0.9.11+dfsg-1`	not yet assigned	Not reported	[850008]
Debian	libvncserver	source	trixie	`0.9.11+dfsg-1`	not yet assigned	Not reported	[850008]
Debian	libvncserver	source	bookworm	`0.9.11+dfsg-1`	not yet assigned	Not reported	[850008]
Alpine	libvncserver	apk	3.10	`0.9.11-r0`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.11	`0.9.11-r0`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.2	`0.9.10-r2`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.3	`0.9.10-r2`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.4	`0.9.10-r2`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.5	`0.9.10-r2`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.6	`0.9.11-r0`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.7	`0.9.11-r0`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.8	`0.9.11-r0`	Not reported	ALPINE-CVE-2016-9942	Not reported
Alpine	libvncserver	apk	3.9	`0.9.11-r0`	Not reported	ALPINE-CVE-2016-9942	Not reported
Ubuntu	libvncserver	deb	14.04	`0.9.9+dfsg-1ubuntu1.2`	Not reported	UBUNTU-CVE-2016-9942	Not reported
Ubuntu	italc	deb	16.04	`1:2.0.2+dfsg1-4ubuntu0.1`	Not reported	UBUNTU-CVE-2016-9942	Not reported
Ubuntu	libvncserver	deb	16.04	`0.9.10+dfsg-3ubuntu0.16.04.1`	Not reported	UBUNTU-CVE-2016-9942	Not reported

[Debian bug #850008]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libveyon-core]Fixed
Source package: [veyon]
Details (2)
- 4.7.5+repack1-1 · amd64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- 4.7.5+repack1-1 · arm64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
[libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
- 0.9.14+dfsg-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- 0.9.14+dfsg-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
- 0.9.14+dfsg-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- 0.9.14+dfsg-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
- 0.9.14+dfsg-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- 0.9.14+dfsg-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[veyon-configurator]Fixed
Source package: [veyon]
Details (2)
- 4.7.5+repack1-1 · amd64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- 4.7.5+repack1-1 · arm64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
[veyon-master]Fixed
Source package: [veyon]
Details (2)
- 4.7.5+repack1-1 · amd64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- 4.7.5+repack1-1 · arm64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
[veyon-plugins]Fixed
Source package: [veyon]
Details (2)
- 4.7.5+repack1-1 · amd64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- 4.7.5+repack1-1 · arm64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
[veyon-service]Fixed
Source package: [veyon]
Details (2)
- 4.7.5+repack1-1 · amd64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- 4.7.5+repack1-1 · arm64 · bookworm
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · bookworm; dsa · veyon · debian · 12

[Debian 13 (Trixie)]

[libveyon-core]Fixed
Source package: [veyon]
Details (2)
- 4.9.5+repack1-2 · amd64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
- 4.9.5+repack1-2 · arm64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
[libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
- 0.9.15+dfsg-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · 13
- 0.9.15+dfsg-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · 13
[libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
- 0.9.15+dfsg-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · 13
- 0.9.15+dfsg-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · 13
[libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
- 0.9.15+dfsg-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · 13
- 0.9.15+dfsg-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 0.9.11+dfsg-1
  dsa · libvncserver · debian · 13
[veyon-configurator]Fixed
Source package: [veyon]
Details (2)
- 4.9.5+repack1-2 · amd64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
- 4.9.5+repack1-2 · arm64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
[veyon-master]Fixed
Source package: [veyon]
Details (2)
- 4.9.5+repack1-2 · amd64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
- 4.9.5+repack1-2 · arm64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
[veyon-plugins]Fixed
Source package: [veyon]
Details (2)
- 4.9.5+repack1-2 · amd64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
- 4.9.5+repack1-2 · arm64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
[veyon-service]Fixed
Source package: [veyon]
Details (2)
- 4.9.5+repack1-2 · amd64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13
- 4.9.5+repack1-2 · arm64 · trixie
  Fixed · Fixed: 4.1.4+repack1-1
  dsa · veyon · debian · 13

Observed: Oct 23, 2026, 5:24:29 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]