Electron: Use-after-free in download save dialog callback

Impact

Apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption.

Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected.

Workarounds

Avoid destroying sessions while a download save dialog may be open. Cancel pending downloads before session teardown.

Fixed Versions

• 41.0.0-beta.7
• 40.7.0
• 39.8.0
• 38.8.6

For more information

If there are any questions or comments about this advisory, please email security@electronjs.org