CVE-2026-34764
Electron: Use-after-free in offscreen shared texture release() callback
Description
### 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)
How to fix CVE-2026-34764
To remediate CVE-2026-34764, upgrade the affected package to a fixed version below.
- —upgrade to 39.8.5 or later
Is CVE-2026-34764 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 33.0.0-alpha.1, < 39.8.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW2.3 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L |