CVEvulnerability

CVE-2026-107614

6.1 MEDIUM Published 2026-10-08 Modified 2026-10-08 Official page ↗
Status
Awaiting Analysis
Published
2026-10-08
Last modified
2026-10-08
Assigner
33c584b5-0579-4c06-b2a0-8d8329fcab9c
CVSS 3.1 (33c584b5-0579-4c06-b2a0-8d8329fcab9c)
6.1 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Weaknesses
CWE-125, CWE-191

Description

An integer underflow in WinCursorShapeUtils::trimTransparent() in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI capture path. The loop bound width - 1 wraps to 0xFFFFFFFF, producing an access roughly 4 GB beyond the 64 KB cursor buffer; a monochrome cursor of height 1 also becomes 0 because getCursorHeight() halves the height in place.

Related

Weakness · CWE (2)

  • CWE-125 Out-of-bounds Read weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References