Submitted by Ch_301, also found by nnez
In execute.rs#cancelreservationafterapprovalforshortterm and execute.rs#cancelreservationafterapprovalforlongterm() , multiple iterations occur over the cancellation vector, which may cause the transaction to fail due to an out-of-gas error.
Consequently, malicious NFT owners could exploit this by setting a big list inside the cancellation vector by invoking execute.rs#setlistforshorttermrental() or  execute.rs#setlistforlongtermrental():
This will force the cancellation of the reservation to fail due to gas limits.
Set a cap for the length of the cancellation vector that owners can set it.
blockchainstar12 (Coded Estate) acknowledged and commented:
