How the BLS Vote Extension Vulnerability Works

[AIcash]

The vulnerability centers on Babylon’s BLS vote extension, which helps validators prove agreement on blocks. By omitting the block hash field, a malicious validator can cause other validators to fail during consensus checks, potentially triggering runtime errors.

While the issue has not been reported as actively exploited, contributors warned that repeated crashes at epoch boundaries could degrade network performance. Developers emphasized that leaving the bug unresolved could expose the system to coordinated disruption attempts.

[96f402f86e]

one validator crashing is whatever, but coordinated disruption is the real nightmare