{"id":"CVE-2026-107613","revision":"de83c7e3bb3d4416a1d3205857d7992a","records":[{"revision":"de83c7e3bb3d4416a1d3205857d7992a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107613","aliases":[],"title":"NULL pointer dereference in TightVNC Server Win8ScreenDriver after failed DXGI re-initialization","description":"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().","state":0,"publishedAt":"2026-10-08T13:39:56.972+00:00","modifiedAt":"2026-10-08T14:01:33.803+00:00","affected":[{"ecosystem":"Vendor product","name":"TightVNC","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"GlavSoft\",\n                    \"product\": \"TightVNC\",\n                    \"platforms\": [\n                        \"Windows\"\n                    ],\n                    \"modules\": [\n                        \"TightVNC Server (Win8/DXGI screen driver)\"\n                    ],\n                    \"programFiles\": [\n                        \"Win8ScreenDriver.cpp\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"Win8ScreenDriver::applyNewScreenProperties()\"\n                        },\n                        {\n                            \"name\": \"Win8ScreenDriver::executeDetection()\"\n                        },\n                        {\n                            \"name\": \"Win8ScreenDriver::getScreenBuffer()\"\n                        },\n                        {\n                            \"name\": \"Win8ScreenDriver::grabFb()\"\n                        },\n                        {\n                            \"name\": \"Win8ScreenDriver::getScreenPropertiesChanged()\"\n                        },\n                        {\n                            \"name\": \"Win8ScreenDriver::getCursorPosition()\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.8.88\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":"MEDIUM"}],"references":["https://sourceforge.net/p/vnc-tight/bugs/1660/","https://www.tightvnc.com/whatsnew.php"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107613","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107613","identifiers":["CVE-2026-107613"]},"retained":false,"historicalAffected":[]}],"coverage":[]}