A vulnerability found in Babylon's staking code may slow down block generation speed

PANews, January 9 — According to Cointelegraph, developers stated in a post on GitHub on Thursday that a newly disclosed software vulnerability in the bitcoin staking protocol Babylon could allow malicious validators to disrupt part of the network's consensus process, potentially slowing down block production during critical periods. This vulnerability affects Babylon's block signature scheme, specifically the BLS voting extension scheme, which is used to prove that validators have reached consensus on a particular block.

The vulnerability allows malicious validators to intentionally omit the block hash field when sending voting extensions, which could lead to validator consensus issues during network epoch boundaries. The block hash field is used to inform validators which blocks they are actually voting for during the consensus process, and this vulnerability allows this field to be omitted. In theory, through this vulnerability, malicious validators could cause other validators to crash during critical consensus checks at phase boundaries, and if multiple validators are affected, it would result in a slowdown of block production. There have been no reports of this vulnerability being actively exploited so far, but developers warn that if left unaddressed, it could be abused.