There is update for all linux clients (including pools/explorers/etc). Technically if your windows/macos wallet is working fine you dont need to update , but you still need to update all your linux machines.
Also it seems that some miners may have this hashing error, so in case of problems, please use the updated official miner until others will update their code.
Information for pools owners:
Please recompile your stratum dedal algo with updated dedal.c file from source code.
Wallets:
https://github.com/numuscrypto/numuscore_physcomitrella/releases/tag/1.5.0.3
Official miner:
https://github.com/numuscrypto/numuscore_physcomitrella/releases/download/1.5.0.3/dedalminer_updated.zip