Integer underflow in the nsHtml5TreeBuilder class in the HTML5 string parser in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) by leveraging mishandling of end tags, as demonstrated by incorrect SVG processing, aka ZDI-CAN-3545.
Google Chrome before 42.0.2311.90 does not properly consider the interaction of page navigation with the handling of touch events and gesture events, which allows remote attackers to trigger unintended UI actions via a crafted web site that conducts a "tapjacking" attack.