Data Processing Errors
zlib in the Compression component in Apple iOS before 9.2, OS X before 10.11.2, tvOS before 9.1, and watchOS before 2.1 does not initialize memory for an unspecified data structure, which allows remote attackers to execute arbitrary code via a crafted web site.
CWE-19 - Data Processing Errors
Weaknesses in this category are typically found in functionality that processes data. Data processing is the manipulation of input to retrieve or save information.