Copied from Fedora.

http://pkgs.fedoraproject.org/cgit/libwmf.git/tree/libwmf-0.2.8.4-CVE-2007-3473.patch

--- libwmf-0.2.8.4/src/extra/gd/gd.c
+++ libwmf-0.2.8.4/src/extra/gd/gd.c
@@ -2483,6 +2483,10 @@ BGD_DECLARE(gdImagePtr) gdImageCreateFromXbm (FILE * fd)
     }
   bytes = (w * h / 8) + 1;
   im = gdImageCreate (w, h);
+  if (!im) {
+    return 0;
+  }
+
   gdImageColorAllocate (im, 255, 255, 255);
   gdImageColorAllocate (im, 0, 0, 0);
   x = 0;

<td class='main'><a href='/'>index</a> : <a href='/guix/'>guix</a></td><td class='form'><form method='get'>
<input type='hidden' name='id' value='fa8af53e99afd932b2e534a428ea6ac62581c89d'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=fa8af53e99afd932b2e534a428ea6ac62581c89d'>refs</a><a class='active' href='/guix/log/srfi'>log</a><a href='/guix/tree/srfi?id=fa8af53e99afd932b2e534a428ea6ac62581c89d'>tree</a><a href='/guix/commit/srfi?id=fa8af53e99afd932b2e534a428ea6ac62581c89d'>commit</a><a href='/guix/diff/srfi?id=fa8af53e99afd932b2e534a428ea6ac62581c89d'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/srfi'>
<input type='hidden' name='id' value='fa8af53e99afd932b2e534a428ea6ac62581c89d'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=fa8af53e99afd932b2e534a428ea6ac62581c89d'>root</a>/<a href='/guix/log/srfi?id=fa8af53e99afd932b2e534a428ea6ac62581c89d'>srfi</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/srfi?id=fa8af53e99afd932b2e534a428ea6ac62581c89d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>