Electron has a use-after-free in offscreen shared texture release() callback

Summary

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 33.0.0-alpha.1 to before 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5, apps that use offscreen rendering with GPU shared textures may be vulnerable to a use-after-free. Under certain conditions, the release() callback provided on a paint event texture can outlive its backing native state, and invoking it after that point dereferences freed memory in the main process, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering with webPreferences.offscreen: { useSharedTexture: true }. Apps that do not enable shared-texture offscreen rendering are not affected. To mitigate this issue, ensure texture.release() is called promptly after the texture has been consumed, before the texture object becomes unreachable. This vulnerability is fixed in 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5.

Timeline

1. Apr 6, 2026, 3:46 PM UTCCVE published
2. Apr 7, 2026, 3:47 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Apr 7, 2026, 4:00 PM UTCRecord last updated

Affected versions

• electron electron

  From 33.0.0-alpha.1 · fixed in 39.8.5; From 40.0.0-alpha.1 · fixed in 40.8.5; From 41.0.0-alpha.1 · fixed in 41.1.0; From 42.0.0-alpha.1 · fixed in 42.0.0-alpha.5

• electronnpm

  From 33.0.0-alpha.1 · fixed in 39.8.5

• electronnpm

  From 40.0.0-alpha.1 · fixed in 40.8.5

• electronnpm

  From 41.0.0-alpha.1 · fixed in 41.1.0

• electronnpm

  From 42.0.0-alpha.1 · fixed in 42.0.0-alpha.5

References 1