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Cisco Bug: CSCvu31763 - vEdge 5k crashing on 18.4.4 with fp-um crash files when using GRE SDWAN tunnels

Last Modified

Oct 09, 2020

Products (1)

  • Cisco XE SD-WAN Routers

Known Affected Releases


Description (partial)

Customer has several vedge 5k devices at the hub site.   The customer is using GRE SDWAN tunnels and devices are seeing fp-um crashes multiple times a day.

Problem occurs when both GRE and ipsec tunnels are configured, and vedge receives malicious ipv4 or ipv6 packet for ipsec with large ip-length field causing to write beyond the buffer bound.
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