Mozilla developers and community members reported memory safety bugs present in Firefox 63 and Firefox ESR 60.3

A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select element in the options collection

When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling

A potential vulnerability leading to an integer overflow can occur during buffer size calculations for images when a raw value is used instead of the checked value

Mozilla developers and community members reported memory safety bugs present in Firefox 62 and Firefox ESR 60.2

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements

Mozilla developers and community members reported memory safety bugs present in Firefox 64 and Firefox ESR 60.4

Memory safety bugs present in Firefox 60, Firefox ESR 60, and Firefox ESR 52.8

Memory safety bugs present in Firefox 60 and Firefox ESR 60

A vulnerability can occur when capturing a media stream when the media source type is changed as the capture is occurring

A use-after-free vulnerability can occur when an IndexedDB index is deleted while still in use by JavaScript code that is providing payload values to be stored

A use-after-free vulnerability can occur when refresh driver timers are refreshed in some circumstances during shutdown when the timer is deleted while still in use

Memory safety bugs present in Firefox 61 and Firefox ESR 60.1

Mozilla developers backported selected changes in the Skia library

An integer overflow can occur in the Skia library due to 32-bit integer use in an array without integer overflow checks, resulting in possible out-of-bounds writes

A use-after-free vulnerability can occur while adjusting layout during SVG animations with text paths

A use-after-free vulnerability can occur while enumerating attributes during SVG animations with clip paths

Memory safety bugs were reported in Firefox 59, Firefox ESR 52.7, and Thunderbird 52.7

Memory safety bugs were reported in Firefox ESR 52.6

A use-after-free vulnerability can occur during font face manipulation when a font face is freed while still in use, resulting in a potentially exploitable crash

A use-after-free vulnerability can occur during mouse event handling due to issues with multiprocess support

A use-after-free vulnerability can occur when manipulating HTML media elements with media streams, resulting in a potentially exploitable crash

A use-after-free vulnerability can occur when the widget listener is holding strong references to browser objects that have previously been freed, resulting in a potentially…

A use-after-free vulnerability can occur when form input elements, focus, and selections are manipulated by script content

A use-after-free vulnerability can occur during XSL transformations when the source document for the transformation is manipulated by script content during the transformation

A use-after-free vulnerability can occur while editing events in form elements on a page, resulting in a potentially exploitable crash

An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 8 GB of RAM

Memory safety bugs were reported in Firefox 57 and Firefox ESR 52.5

A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use

Memory safety bugs were reported in Firefox 56 and Firefox ESR 52.4

A buffer overflow occurs when drawing and validating elements with the ANGLE graphics library, used for WebGL content

A use-after-free vulnerability can occur in design mode when image objects are resized if objects referenced during the resizing have been freed from memory

A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applications (ARIA) elements within containers through the DOM

Memory safety bugs were reported in Firefox 55 and Firefox ESR 52.3

A use-after-free vulnerability can occur when an editor DOM node is deleted prematurely during tree traversal while still bound to the document

A use-after-free vulnerability can occur when manipulating the DOM during the resize event of an image element

A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style object is freed while still in use

A use-after-free vulnerability can occur in WebSockets when the object holding the connection is freed before the disconnection operation is finished

A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash

A buffer overflow will occur when viewing a certificate in the certificate manager if the certificate has an extremely long object identifier (OID)

A buffer overflow can occur when the image renderer attempts to paint non-displayable SVG elements

A buffer overflow can occur when manipulating Accessible Rich Internet Applications (ARIA) attributes within the DOM

A use-after-free vulnerability can occur when reading an image observer during frame reconstruction after the observer has been freed

Memory safety bugs were reported in Firefox 54, Firefox ESR 52.2, and Thunderbird 52.2

A number of security vulnerabilities in the Graphite 2 library including out-of-bounds reads, buffer overflow reads and writes, and the use of uninitialized memory

A use-after-free vulnerability in IndexedDB when one of its objects is destroyed in memory while a method on it is still being executed

A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR)

A use-after-free vulnerability with content viewer listeners that results in a potentially exploitable crash

A use-after-free vulnerability during video control operations when a "<track>" element holds a reference to an older window if that window has been replaced in the DOM

A use-after-free vulnerability when using an incorrect URL during the reloading of a docshell