CVE-2026-34774

説明

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0.

参照情報

NVDが列挙した参照URLを、リンクのホスト・パターンに対する機械的な一致でグループ化したもの。ラベルはリンクの種別のみを示します。

• ベンダー勧告 https://github.com/electron/electron/security/advisories/GHSA-532v-xpq5-8h95
• ディストリ https://access.redhat.com/security/cve/CVE-2026-34774
• ディストリ https://bugzilla.redhat.com/show_bug.cgi?id=2455026
• ディストリ https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34774.json