← WebKit Silent-Fix Report — 2026-W21
912cfd18d9 [Win] `OSAllocator::tryProtect` fails when memory spans multiple reserved regions
severity medium
class Other
confidence 0.50
WTF OSAllocator (Windows)
Primitive: memory protection not applied
Triage note: Previously VirtualAlloc protection could silently fail spanning regions, leaving guard/W^X protections unapplied on Windows.
Triage note: Previously VirtualAlloc protection could silently fail spanning regions, leaving guard/W^X protections unapplied on Windows.
Security-relevant, below the exploitable-grade bar for a full root-cause writeup. The triage verdict is above; the side-by-side patch is below.
Before / after
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