CVE-2021-30984: A race condition was addressed with improved state handling.

Security readout for executives and security teams

CVE-2021-30984 is a WebKit-related race condition where malicious web content could cause arbitrary code execution. In practical terms, an affected device or browser may be exposed simply by processing a crafted webpage. Apple fixed it in December 2021 platform updates, but the bundle does not show active exploitation. Exposure is most likely on unpatched Apple devices or systems using vulnerable WebKitGTK/WPE WebKit packages. Public-facing servers are not the main concern; the primary risk is endpoint or user-session compromise through malicious web content. Treat this as a high-priority endpoint patching issue. It enables code execution through web content, but the available evidence does not show known active exploitation. Focus on updating browsers, Apple devices, and WebKit-based packages in managed environments. Mitigation focus: Update Apple devices to the fixed versions or later.; Update Safari to 15.2 or later where applicable.; Check Debian, Fedora, WebKitGTK, and WPE WebKit advisories for package-specific fixes..

Prepared

Jun 2, 2026, 18:39 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.