REDHAT-BUG-2455026: Use After Free
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 39.8.1 - Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 40.7.0 - Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 41.0.0
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2455026?
The severity of REDHAT-BUG-2455026 is high, rated at 7.
How do I fix REDHAT-BUG-2455026?
To fix REDHAT-BUG-2455026, upgrade Electron to versions 39.8.1, 40.7.0, or 41.0.0 or higher.
What type of vulnerability is REDHAT-BUG-2455026?
REDHAT-BUG-2455026 is classified as a use-after-free vulnerability.
What applications are affected by REDHAT-BUG-2455026?
Applications that use Electron with offscreen rendering and allow child windows via window.open() are affected by REDHAT-BUG-2455026.
When was REDHAT-BUG-2455026 published?
REDHAT-BUG-2455026 was published on April 4, 2026.