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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()."}],"metrics":[{"cvssV3_1":{"baseScore":5.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-08T13:39:56.972Z","orgId":"33c584b5-0579-4c06-b2a0-8d8329fcab9c","shortName":"securin"},"references":[{"name":"TightVNC bug #1660","tags":["issue-tracking"],"url":"https://sourceforge.net/p/vnc-tight/bugs/1660/"},{"name":"TightVNC release notes (2.8.88)","tags":["release-notes","patch"],"url":"https://www.tightvnc.com/whatsnew.php"}],"solutions":[{"lang":"en","value":"Upgrade TightVNC for Windows to version 2.8.88 or later."}],"source":{"discovery":"EXTERNAL"},"timeline":[{"lang":"en","time":"2026-05-30T00:00:00.000Z","value":"Reported to GlavSoft"},{"lang":"en","time":"2026-06-02T00:00:00.000Z","value":"Vendor acknowledged"},{"lang":"en","time":"2026-06-19T00:00:00.000Z","value":"TightVNC 2.8.88 released with fix"}],"title":"NULL pointer dereference in TightVNC Server Win8ScreenDriver after failed DXGI re-initialization"}},"cveMetadata":{"assignerOrgId":"33c584b5-0579-4c06-b2a0-8d8329fcab9c","assignerShortName":"securin","cveId":"CVE-2026-107613","datePublished":"2026-10-08T13:39:56.972Z","dateReserved":"2026-10-08T13:23:07.677Z","dateUpdated":"2026-10-08T14:01:33.803Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-08 14:16:50","lastModifiedDate":"2026-10-08 15:17:45","problem_types":["CWE-476","CWE-476 CWE-476 NULL Pointer Dereference"],"metrics":{"cvssMetricV31":[{"source":"33c584b5-0579-4c06-b2a0-8d8329fcab9c","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-08T14:01:21.134363Z","id":"CVE-2026-107613","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"107613","Ordinal":"1","Title":"NULL pointer dereference in TightVNC Server Win8ScreenDriver aft","CVE":"CVE-2026-107613","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"107613","Ordinal":"1","NoteData":"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().","Type":"Description","Title":"NULL pointer dereference in TightVNC Server Win8ScreenDriver aft"}]}}}