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**Name of the Vulnerable Software and Affected Versions** Google Chrome versions prior to 40.0.2214.111 Google Chrome on Android versions prior to 40.0.2214.109 Opera (affected versions not specified) **Description** A use-after-free issue in the `VisibleSelection::nonBoundaryShadowTreeRootNode` function in the DOM implementation in Blink allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted JavaScript code that triggers improper handling of a `shadow-root` anchor. **Recommendations** For Google Chrome versions prior to 40.0.2214.111, update to version 40.0.2214.111 or later. For Google Chrome on Android versions prior to 40.0.2214.109, update to version 40.0.2214.109 or later. For Opera, at the moment, there is no information about a newer version that contains a fix for this issue.