Monero (XMR) developers warn they have discovered a "significant bug" in the cryptocurrency's decoy selection algorithm that may impact transaction's privacy. According to a series of tweets, the bug allows identifying the output of a transaction if a user spends funds immediately following the lock time in the first 2 blocks allowable by consensus rules.
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This does not reveal anything about addresses or transaction amounts. Funds are never at risk of being stolen. This bug persists in the official wallet code today.
— Monero || #xmr (@monero) July 27, 2021
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The developers say users can simply reduce the risk to their privacy by waiting 1 hour or longer before spending their newly-received XMR. Until then, the developers are planning to work on a fix that will be added in a future wallet software update. A full network upgrade is not required to address the bug, the developers added.
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