Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: ce27a48eff723793df39a98f323ce015ee9b62e6
https://github.com/WebKit/WebKit/commit/ce27a48eff723793df39a98f323ce015ee9b62e6
Author: Dominic Mazzoni <[email protected]>
Date: 2026-06-18 (Thu, 18 Jun 2026)
Changed paths:
M Source/WebCore/accessibility/AccessibilityScrollView.cpp
Log Message:
-----------
AX: missing null check of WeakPtr ancestorCache in AccessibilityScrollView
https://bugs.webkit.org/show_bug.cgi?id=317367
rdar://179987767
Reviewed by Tyler Wilcock.
The original cache (the scroll view's own cache) was already guarded
at line 558, but ancestorCache — obtained from a different document,
which can be torn down independently while AT clients are still
traversing — was being dereferenced unguarded.
No known repro, found via StabilityTracer.
* Source/WebCore/accessibility/AccessibilityScrollView.cpp:
(WebCore::AccessibilityScrollView::crossFrameParentObject const):
Canonical link: https://commits.webkit.org/315470@main
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