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      <title>CVE-2026-107613 — NULL pointer dereference in TightVNC Server Win8ScreenDriver after failed DXGI re-initialization</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-107613</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; GlavSoft TightVNC&lt;/p&gt;
&lt;p&gt;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().&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; GlavSoft TightVNC&lt;/p&gt;
&lt;p&gt;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().&lt;/p&gt;</content:encoded>
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