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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Return values of JSArray::createUninitialized (and related) are not consistently checked for nullptr"
href="https://bugs.webkit.org/show_bug.cgi?id=159495">159495</a>
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<th>Summary</th>
<td>Return values of JSArray::createUninitialized (and related) are not consistently checked for nullptr
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>WebCore Misc.
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>bfulgham@webkit.org
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<p>
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<pre>Various members of the JSArray class hierarchy provide some version of createUninitialized/tryCreateUninitialized. These implementations return nullptr when various bad conditions exist, such as requests greater than available memory, etc.
While we have nullptr checks in most places, there are a number of cases where these are not present. This makes it possible for arbitrary web content to crash WebKit through a nullptr dereference.</pre>
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