The IcedTea-Web project provides a Java web browser plug-in and an implementation of Java Web Start, which is based on the Netx project. It also contains a configuration tool for managing deployment settings for the plug-in and Web Start implementations. A buffer overflow flaw was found in the IcedTea-Web plug-in. Visiting a malicious web page could cause a web browser using the IcedTea-Web plug-in to crash or, possibly, execute arbitrary code. Red Hat would like to thank Arthur Gerkis for reporting this issue. This erratum also upgrades IcedTea-Web to version 1.2.2. Refer to the NEWS file, linked to in the References, for further information. All IcedTea-Web users should upgrade to these updated packages, which resolve this issue. Web browsers using the IcedTea-Web browser plug-in must be restarted for this update to take effect.