The Gis_line_string::init_from_wkb function in sql/spatial.cc in MySQL 5.1 before 5.1.51 allows remote authenticated users to cause a denial of service (server crash) by calling the PolyFromWKB function with Well-Known Binary (WKB) data containing a crafted number of (1) line strings or (2) line points.
http://bugs.mysql.com/bug.php?id=51875
http://dev.mysql.com/doc/refman/5.1/en/news-5-1-51.html
http://lists.mysql.com/commits/117094
https://bugzilla.redhat.com/show_bug.cgi?id=640865
http://secunia.com/advisories/42875
http://secunia.com/advisories/42936
https://exchange.xforce.ibmcloud.com/vulnerabilities/64838
http://www.debian.org/security/2011/dsa-2143
http://www.mandriva.com/security/advisories?name=MDVSA-2010:222
http://www.mandriva.com/security/advisories?name=MDVSA-2010:223
http://www.redhat.com/support/errata/RHSA-2010-0824.html
http://www.redhat.com/support/errata/RHSA-2010-0825.html
http://www.redhat.com/support/errata/RHSA-2011-0164.html
http://www.ubuntu.com/usn/USN-1017-1
http://www.ubuntu.com/usn/USN-1397-1
http://www.vupen.com/english/advisories/2011/0105