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Mozilla Foundation Security Advisory 2016-56

Use-after-free when textures are used in WebGL operations after recycle pool destruction

Announced
June 7, 2016
Reporter
jomo
Impact
High
Products
Firefox, Firefox ESR
Fixed in
  • Firefox 47
  • Firefox ESR 45.2

Description

Mozilla community member jomo reported a use-after-free crash when processing WebGL content. This issue was caused by the use of a texture after its recycle pool has been destroyed during WebGL operations, which frees the memory associated with the texture. This results in a potentially exploitable crash when the texture is later called.

References