Threshold Restarts tBTC Bridge Following Security Pause as Aave Holds Freeze

The Threshold Network initiated the restart of its tBTC bridge on Sunday after a nine-day security shutdown, according to an announcement from the protocol ¹. Despite the bridge's onchain recovery, an Aave reserve holding approximately $120 million worth of the wrapped asset remains restricted from accepting new deposits or granting additional borrowing power ¹.

Threshold halted bridge activity on Oct. 30 after identifying a critical Linux kernel vulnerability capable of granting remote attackers arbitrary code execution on unpatched hardware ¹. The network reported that independent node operators, who jointly validate Bitcoin transfers and facilitate minting and redemption cycles, are reconnecting after applying security patches ¹. The protocol stated that it identified no evidence that the vulnerability was exploited against its nodes, nor were any unauthorized token mints or Bitcoin transfers detected ¹. Backing reserves stand at roughly 4,320 $BTC against an active circulation of approximately 4,185 tBTC ¹.

Unfreezing Conditions on Aave

While the bridge processes backlogged transactions submitted prior to the Oct. 30 suspension, the front-end application will not permit new minting, deposits, or redemptions until a sufficient threshold of operators re-establishes connectivity ¹. Threshold has not yet set a definitive date for full operational capability ¹.

In response to the initial stoppage, lending protocol $AAVE froze its tBTC reserve on Ethereum Core on Oct. 31 to curb protocol exposure while underlying redemptions were paused ¹. Existing depositors may continue withdrawing assets and servicing outstanding debt ¹. Risk management firm LlamaRisk stated that it plans to submit a governance proposal to lift the reserve restrictions once Threshold demonstrates normalized operations ¹.