CVE-2026-107613 — NULL pointer dereference in TightVNC Server Win8ScreenDriver after failed DXGI re-initialization
A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing …
Published: 2026-10-08 · CVSS: 5.9 · CVSS 3.1
A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service. When re-initialization of the DXGI Desktop Duplication driver fails in applyNewScreenProperties() (for example after a GPU reset, display hot-plug or session change), m_drvImpl is left NULL and is subsequently dereferenced without a check by executeDetection(), getScreenBuffer(), grabFb(), getScreenPropertiesChanged() and getCursorPosition().
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7