CVE Database›Document archive›CVE-2019-15690

CVE-2019-15690

libvncserver: HandleCursorShape() integer overflow resulting in heap-based buffer overflow

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Severity

Important

Red Hat Product Security

9.8

CVSS 3.1

Review impact separately from score.

Published · December 20, 2019

Updated · June 27, 2026

Description

A flaw was found in libvncserver. An integer overflow within the HandleCursorShape() function can be exploited to cause a heap-based buffer overflow by tricking a user or application using libvncserver to connect to an unstrusted server and subsequently send cursor shapes with specially crafted dimensions. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Libvncserver should not be used to connect to untrusted server.

CVSS / CWE

CVSS 3.1 · 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-190 · Integer Overflow or Wraparound