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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-54257

Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow

Description

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 resulting in heap buffer under/overflow. Most apps will crash and some may perform incorrect buffer allocations in the Node.js Buffer API resulting in unexpected truncation or allocation. This vulnerability is fixed in 42.3.3.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

electron electron

  • >= 42.3.1, < 42.3.3affected

References