Wireshark 1.6.x before 1.6.2 allows remote attackers to cause a denial of service (application crash) via a malformed capture file that leads to an invalid root tvbuff, related to a "buffer exception handling vulnerability."
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.