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CVE-2026-40369 Windows Kernel Arbitrary Write Chrome SBX
by orinimron123·May 28, 2026·3 points·0 comments
AI Analysis
●●●●GemWizardryBig BrainRabbit Hole
100% deterministic SYSTEM escalation from Chrome sandbox via audited syscall.
Strengths
- •Single syscall achieves privilege escalation with no race conditions or heap spray.
- •Found in NtQuerySystemInformation class 253, bypassing decades of audit assumptions.
- •Full exploit developed with complete technical writeup and disclosure.
Weaknesses
- •Public disclosure without vendor patch window may accelerate weaponization.
- •Limited to Windows 11 24H2–25H2; older versions may differ.
Category
Target Audience
Security researchers, Windows kernel developers, browser security engineers
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Project Zero disclosures · ZDI advisories · Google Security Blog
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