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Windows Win32K - GRFX

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high advisory

CVE-2026-40403 Heap-based Buffer Overflow in Windows Win32K - GRFX

CVE-2026-40403 is a heap-based buffer overflow vulnerability in Windows Win32K - GRFX that allows an authorized local attacker to execute arbitrary code, potentially leading to privilege escalation and code execution.

Windows Win32K - GRFX heap-overflow code-execution windows
2r 2t
high advisory

CVE-2026-34347 Use-After-Free Vulnerability in Windows Win32K - GRFX

CVE-2026-34347 is a use-after-free vulnerability in Windows Win32K - GRFX that allows an authorized local attacker to elevate privileges.

Windows Win32K - GRFX privilege-escalation use-after-free windows
2r 1t 1c