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Release Notes for v8.4.1


  • Fix: DCHECK failure in value.IsHeapObject() in objectsdebug.cc. (Chromium security issue 1084820). #24565
  • Fix: PDFium Javascript Active Document memory corruption. (Chromium security issue 1091404). #24570
  • Fix: XSS on chrome://histograms/ with a compromised renderer. (Chromium security issue 1073409). #24626
  • Fix: heap-use-after-free in content::NavigationRequest::OnWillProcessResponseProcessed. (Chromium security issue 1090543). #24568
  • Fix: heap-use-after-free in ui::AXTreeSerializerblink (Chromium security issue 1065122). #24556
  • Fix: integer overflow in GrTextBlob::Make. (Chromium security issue 1080481). #24587
  • Fix: javascript URI sandbox flags aren't propagated in a blank string case. (Chromium security issue 1074340). #24622
  • Fix: memcpy-param-overlap in AudioBuffer::copyFromChannel. (Chromium security issue 1081722). #24585
  • Fix: remove leaks of post-redirect URL for <script> in the CSP reports and stacktraces of errors (Chromium security issue 1074317). #24559
  • Fix: update webrtc root certificate. (Chromium security issue 978779). #24618
  • Fix: use-after-free in devtools console. (Chromium security issue 986051). #24615
  • Fix: use-of-uninitialized-value in amr_read_header. (Chromium security issue 1065731). #24595
  • Fix: usrsctp is called with pointer as network address. (Chromium security issue 1076703). #24562
  • Fixed a termination crash on Web Workers with Node.js integration enabled. #24463
  • Fixed an issue where cpu and heap profiling in Node.js did not work properly with --cpu-prof, --heap-prof, and related CLI flags. #24542
  • Fixed an issue where macOS window vibrancy active state did not always match the active state of the window. #24546
  • Fixed broken --trace-sync-io flag in Node.js. #24649
  • Fixed clipboard.readBuffer returning incorrect value. #24468
  • Fixed crash when opening app in remote X server. #24491
  • Fixed unresponsive window when reloading with breakpoint in devtools. #24490


  • Documentation changes: #24515

Release Notes for v8.4.0


  • Added new render-process-gone event on app to replace the renderer-process-crashed event. #24314
  • Added new render-process-gone event to replace the crashed event. #24308
  • Added support for suspend and resume events to Windows. #24282
  • Added support for suspend and resume events to macOS. #24295
  • Added tracing instrumentation to WebContents IPC methods, available with the contentTracing category "electron". #24307
  • Expose sessionId associated with a target from debugger module. #24399
  • Implemented systemPreferences.getMediaAccessStatus() on Windows. #24313


  • Backported fixes for UAF in extensions (CVE-2020-6454 and NOCVE). #24419
  • Fixed an intermittent high-CPU usage problem caused a system clock issue during sleep. #24414
  • Fixed an issue where some old notifications were not properly removed from the Notification Center on macOS. #24405
  • Fixed bug on macOS where the main window could be targeted for a focus event when it was disabled behind a modal. #24353