kmonsen
WebKit security specialist
Summary
kmonsen works across the WebCore/WebKit boundary with a consistent focus on crash fixes: null-pointer and lifetime failures in IPC decoding and serialization (CoreIPCCGColorSpace's null `Box<>`, FontPlatformSerializedAttributes, CFDictionary retain callbacks), plus input validation on network process entry points like `NetworkConnectionToWebProcess::createSocketChannel` and WebRTC socket creation. The security-flagged work leans toward object-lifetime and iterator-invalidation issues — WeakHashSet iteration during mutation, "check for destroyed" guards, an ASAN crash in CSSVariableData — rather than memory corruption in hot paths, and one commit disables remote display list rendering outright rather than fixing it. Systematic-variant candidate: the CoreIPC decode surface, where several distinct types were found dereferencing unvalidated decoded fields; sibling serializers in the same Cocoa/CoreGraphics wrapper family are the natural sweep.
Components
Security Fix History
- 2026-08-05 WebAuthenticatorCoordinatorProxy signal methods must invoke reply CompletionHandler on the main run loop 2026-W31
- 2026-06-16 Check for destroyed ·
- 2026-05-03 Fix ASAN crash in CSSVariableData 2026-W18
- 2026-04-28 Use WeakHashSet::forEach to iterate over set where the iterator might be invalidated 2026-W17
- 2026-04-24 Disable remote display list rendering mode 2026-W16
- 2026-04-17 Upgrade vector.grow() assert to release assert 2026-W15
Hardening Commits
- 2026-05-03 Fix ASAN crash in CSSVariableData 2026-W18
Recent Commits
- 2026-08-05 Crash in WidthIterator::applyTextSpacingTrimIfNeeded when a character has no glyph in any font
- 2026-08-05 WebAuthenticatorCoordinatorProxy signal methods must invoke reply CompletionHandler on the main run loop 2026-W31
- 2026-07-28 Crash in NavigateEvent::finish when document element is removed inside navigate handler
- 2026-07-14 WebGL2: drawElements with UNSIGNED_INT indices crashes when element array buffer size is not a multiple of 4
- 2026-06-16 Check for destroyed ·
- 2026-06-11 CoreIPCCGColorSpace::toCF() crashes dereferencing null Box<> when decoding IndexedColorSpace
- 2026-06-10 getEnclosureList() crashes when a descendant is inside a display:contents <g> element
- 2026-06-10 color-mix() with all-absolute color components crashes renderer when nested
- 2026-06-07 Reject WebRTC socket creation with empty address to fix crash
- 2026-05-29 FontPlatformSerializedAttributes::toCFDictionary should skip null key/value pairs in paletteColors and variations
- 2026-05-20 NetworkConnectionToWebProcess::createSocketChannel should reject requests with an invalid URL
- 2026-05-03 Fix ASAN crash in CSSVariableData 2026-W18
- 2026-04-28 Use WeakHashSet::forEach to iterate over set where the iterator might be invalidated 2026-W17
- 2026-04-27 [WTF] Fix crash in utf8ForCharacters when string ends with unpaired surrogate
- 2026-04-24 Disable remote display list rendering mode 2026-W16