CVE-2017-5581

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows...

9.8 CriticalFix available

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via an RRE message with subrectangle outside framebuffer boundaries.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

4.25%Up 0.7 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2017-5581
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2017-5581
Updated: 2026-11-02

EUVDEUVD-2017-14682 No score

Record: EUVD-2017-14682
Updated: 2026-11-03

GitHub AdvisoriesGHSA-q2c6-v9x6-qvr4 9.8

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows...

Record: GHSA-q2c6-v9x6-qvr4
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

OSV 9.8

Record: CVE-2017-5581
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2017-5581 9.8

Record: DEBIAN-CVE-2017-5581
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2017:0630 7.5

Red Hat Security Advisory: tigervnc security and bug fix update

Record: RHSA-2017:0630
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2017:2000 7.5

Red Hat Security Advisory: tigervnc and fltk security, bug fix, and enhancement update

Record: RHSA-2017:2000
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2017-5581 9.8

Record: UBUNTU-CVE-2017-5581
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

tigervnc

Affected packages

Affected packages
Package	Affected	Fixed
`tigervnc` Debian:12	before 1.7.0+dfsg-3	1.7.0+dfsg-3
`tigervnc` Debian:13	before 1.7.0+dfsg-3	1.7.0+dfsg-3
`tigervnc` Debian:14	before 1.7.0+dfsg-3	1.7.0+dfsg-3
`tigervnc-debuginfo` Red Hat:enterprise_linux:6::client	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-applet` Red Hat:enterprise_linux:6::client	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-module` Red Hat:enterprise_linux:6::client	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc` Red Hat:enterprise_linux:6::client	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server` Red Hat:enterprise_linux:6::client	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc` Red Hat:enterprise_linux:6::computenode	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-debuginfo` Red Hat:enterprise_linux:6::computenode	before 0:1.1.0-24.el6	0:1.1.0-24.el6

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Affected packages
Package	Affected	Fixed
`tigervnc-server` Red Hat:enterprise_linux:6::computenode	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-applet` Red Hat:enterprise_linux:6::computenode	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-module` Red Hat:enterprise_linux:6::computenode	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-debuginfo` Red Hat:enterprise_linux:6::server	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-applet` Red Hat:enterprise_linux:6::server	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-module` Red Hat:enterprise_linux:6::server	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc` Red Hat:enterprise_linux:6::server	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server` Red Hat:enterprise_linux:6::server	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-debuginfo` Red Hat:enterprise_linux:6::workstation	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-applet` Red Hat:enterprise_linux:6::workstation	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server-module` Red Hat:enterprise_linux:6::workstation	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc` Red Hat:enterprise_linux:6::workstation	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`tigervnc-server` Red Hat:enterprise_linux:6::workstation	before 0:1.1.0-24.el6	0:1.1.0-24.el6
`fltk-debuginfo` Red Hat:enterprise_linux:7::client	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-devel` Red Hat:enterprise_linux:7::client	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-fluid` Red Hat:enterprise_linux:7::client	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-static` Red Hat:enterprise_linux:7::client	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc-debuginfo` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-applet` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-module` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`fltk` Red Hat:enterprise_linux:7::client	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-icons` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-license` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-minimal` Red Hat:enterprise_linux:7::client	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`fltk` Red Hat:enterprise_linux:7::computenode	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-debuginfo` Red Hat:enterprise_linux:7::computenode	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-devel` Red Hat:enterprise_linux:7::computenode	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-fluid` Red Hat:enterprise_linux:7::computenode	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-static` Red Hat:enterprise_linux:7::computenode	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-debuginfo` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-icons` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-applet` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-module` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-license` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-minimal` Red Hat:enterprise_linux:7::computenode	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`fltk-debuginfo` Red Hat:enterprise_linux:7::server	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-devel` Red Hat:enterprise_linux:7::server	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-fluid` Red Hat:enterprise_linux:7::server	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-static` Red Hat:enterprise_linux:7::server	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc-debuginfo` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-applet` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-module` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`fltk` Red Hat:enterprise_linux:7::server	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-icons` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-license` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-minimal` Red Hat:enterprise_linux:7::server	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`fltk-debuginfo` Red Hat:enterprise_linux:7::workstation	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-devel` Red Hat:enterprise_linux:7::workstation	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-fluid` Red Hat:enterprise_linux:7::workstation	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`fltk-static` Red Hat:enterprise_linux:7::workstation	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc-debuginfo` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-applet` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-module` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`fltk` Red Hat:enterprise_linux:7::workstation	before 0:1.3.4-1.el7	0:1.3.4-1.el7
`tigervnc` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-icons` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-license` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7
`tigervnc-server-minimal` Red Hat:enterprise_linux:7::workstation	before 0:1.8.0-1.el7	0:1.8.0-1.el7

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-5581 is a critical vulnerability (CVSS 9.8) in Tigervnc, published February 28, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.25%, the 91st percentile. Fixed in tigervnc 1.7.0+dfsg-3.

References

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