Electron: Use-after-free in offscreen shared texture release() callback
Date: 2026-04
Affected: npm/electron, npm/electron, npm/electron
Attack vector: other
Category: vulnerability-disclosure
Severity: Low
CVE: CVE-2026-34764
CWE: CWE-416
CVSS: 2.3 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L)

### Impact 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. ### Workarounds Ensure `texture.release()` is called promptly after the texture has been consumed, before the texture object becomes unreachable. ### Fixed Versions * `42.0.0-alpha.5` * `41.1.0` * `40.8.5` * `39.8.5` ### For more information If there are any questions or comments about this advisory, send an email to [security@electronjs.org](mailto:security@electronjs.org)


Mitigations:

Architectural layers (MAESTRO):