Skip to content
Fencer Vulns
high 7.2

CVE-2019-15693 json

TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient.

published 2019-12-26 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-6632

cvss
7.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

Patch / fix

  • tigervnc tigervnc 1.10.1
  • tigervnc Debian 14, Debian 13, Debian 12 1.10.1+dfsg-1

debian advisories DEBIAN-CVE-2019-15693

  • tigervnc RHEL 7 1.8.0-21.el7
  • tigervnc-icons RHEL 7 1.8.0-21.el7
  • tigervnc-server RHEL 7 1.8.0-21.el7
  • tigervnc-license RHEL 7 1.8.0-21.el7
  • tigervnc-server-applet RHEL 7 1.8.0-21.el7
  • tigervnc-server-module RHEL 7 1.8.0-21.el7
  • tigervnc-server-minimal RHEL 7 1.8.0-21.el7
  • tigervnc RHEL 8 1.9.0-14.el8_1

red hat advisories RHSA-2020:3875RHSA-2020:1497

  • tigervnc SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +1 more 1.6.0-22.14.1
  • tigervnc SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES 12 SP3-LTSS +8 more 1.6.0-18.28.1
  • tigervnc SLE Module for Desktop Applications 15 SP1, SLE Module for Basesystem 15 SP1 1.9.0-19.3.1
  • tigervnc SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 1.8.0-13.11.1
  • tigervnc SLES for SAP 12 SP1, SLES 12 SP1-LTSS 1.4.3-25.11.1

suse advisories SUSE-SU-2020:1749-1SUSE-SU-2020:0266-1SUSE-SU-2020:0159-1SUSE-SU-2020:0113-1SUSE-SU-2020:0112-1

  • tigervnc openSUSE Tumbleweed 1.10.1-17.1
  • tigervnc openSUSE Leap 15.1 1.9.0-lp151.4.3.1

opensuse advisories openSUSE-SU-2024:10591-1openSUSE-SU-2020:0087-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-15693 updated cvss 7.2

tigervnc: Heap buffer overflow in TightDecoder::FilterGradient

  • Red Hat Enterprise Linux 6 tigervnc, tigervnc-server, tigervnc-server-applet, tigervnc-server-module
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) tigervnc 1.9.0-14.el8_1, tigervnc-icons 1.9.0-14.el8_1, tigervnc-server 1.9.0-14.el8_1, tigervnc-license 1.9.0-14.el8_1, tigervnc-server-applet 1.9.0-14.el8_1, tigervnc-server-module 1.9.0-14.el8_1, +1 more
    fixed: vendor fix RHSA-2020:1497
  • Red Hat Enterprise Linux Client (v. 7) tigervnc 1.8.0-21.el7, tigervnc-icons 1.8.0-21.el7, tigervnc-server 1.8.0-21.el7, tigervnc-license 1.8.0-21.el7, tigervnc-server-minimal 1.8.0-21.el7 Red Hat Enterprise Linux Client Optional (v. 7) tigervnc-server-applet 1.8.0-21.el7, tigervnc-server-module 1.8.0-21.el7 Red Hat Enterprise Linux ComputeNode (v. 7) tigervnc 1.8.0-21.el7, tigervnc-license 1.8.0-21.el7, tigervnc-server-minimal 1.8.0-21.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) tigervnc 1.8.0-21.el7, tigervnc-icons 1.8.0-21.el7, tigervnc-server 1.8.0-21.el7, tigervnc-server-applet 1.8.0-21.el7, tigervnc-server-module 1.8.0-21.el7 Red Hat Enterprise Linux Server (v. 7) tigervnc 1.8.0-21.el7, tigervnc-icons 1.8.0-21.el7, tigervnc-server 1.8.0-21.el7, tigervnc-license 1.8.0-21.el7, tigervnc-server-minimal 1.8.0-21.el7 Red Hat Enterprise Linux Server Optional (v. 7) tigervnc-server-applet 1.8.0-21.el7, tigervnc-server-module 1.8.0-21.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) tigervnc 1.8.0-21.el7, tigervnc-icons 1.8.0-21.el7, tigervnc-server 1.8.0-21.el7, tigervnc-license 1.8.0-21.el7, tigervnc-server-minimal 1.8.0-21.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) tigervnc-server-applet 1.8.0-21.el7, tigervnc-server-module 1.8.0-21.el7
    fixed: vendor fix RHSA-2020:3875

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.28% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com https://www.openwall.com/lists/oss-security/2019/12/20/2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Kaspersky TigerVNC

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.