Mozilla developers and community members reported several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code.
Security researcher firehack reported a buffer overflow when parsing HTML5 fragments in a foreign context such as under an
<svg> node. This results in a potentially exploitable crash when inserting an HTML fragment into an existing document.