Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow
### Impact Most apps will crash and some may perform incorrect buffer allocations in the Node.js `Buffer` API resulting in unexpected truncation or allocation. ### Workarounds No workarounds. Do not use these impacted Electron releases ### Fixed Versions * `42.3.3` ### For more information If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-54257US | — | — | ||
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.1 until 42.3.3, Buffer performs incorrect byte length calculations… | ||||
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references
External citations — patches, advisories, analysis.
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