Step 5: Contract checks lock amount - still sees full balance (not updated yet!) Step 6: Contract sends ALL locked tokens to attacker Step 7: Original `splitLock` function resumes and creates a new lock with (amount-1) tokens

The vulnerability lived in the `splitLock` function. It would: * Take your lock * Split it into two * Send you surplus ETH * THEN update your lock amount See the problem? The order is wrong.

Splitlock

🚨TenArmor Security Alert🚨 Our system has detected a suspicious reentrancy attack involving #TOSHI @Toshi_base on #BASE, resulting in an approximately loss of $11K. The splitLock function in the Locker contract 0x80b9 has a reentrancy vulnerability, allowing the attacker to create a new lock with incorrect amount due to ETH transfer in feeHandler function. Attack transactions: basescan.org/tx/0xad3dfc7da4… basescan.org/tx/0x331084925a… With TenArmor's ArgusAlert, you get early detection and automated response to on-chain attacks. Need protection? Reach out anytime! #TenArmorAlert #TenArmor

Introducing Our Next Feature on Split: Lock & Secure Your FUNDS! Soon, you'll be able to lock your USDC until you need it. Set a date and time, and your funds will stay secure until then. Any APY yet, we can’t say, just pure control over your assets. Stay tuned with SplitLock

🚨TenArmor Security Alert🚨 Our system has detected a suspicious Reentrancy attack involving #BIZNESS #Locker on #BASE, resulting in an approximately loss of $15.7K. The splitLock function in the Locker contract reduces the lock amount and creates a new lock after calling the _feeHandler function, which sends surplus ETH to msg.sender. This creates an opportunity for reentrancy, allowing the attacker to call the withdrawLock function and withdraw tokens while simultaneously creating a new lock, due to the lock amount not being updated. Attack transaction: basescan.org/tx/0x984cb29cdb… With TenArmor's ArgusAlert, you get early detection and automated response to on-chain attacks. Need protection? Reach out anytime! #TenArmorAlert #TenArmor

Also splitlock spam lmao

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Linux Adding New Control Since Its Splitlock Detector Is Wrecking Some Games phoronix.com/news/Linux-Spli…

Linux Adding New Control Since Its #Splitlock Detector Is Wrecking gaming performance lore.kernel.org/lkml/2022121…

Linux Adding New Control Since Its Splitlock Detector Is Wrecking Some Steam Play Games phoronix.com/news/Linux-Spli… Discussions: discu.eu/q/phoronix.com/news… #linux #linux_gaming #unix by @michaellarabel

Linux Adding New Control Since Its Splitlock Detector Is Wrecking Some Steam Play Games: Back in 2020 the Linux kernel added a split-lock detector since when they occur an atomic instruction spanning multiple cache lines and… dlvr.it/SfJFLL #linux #opensource #cloud

#kernel Re: [GIT PULL] x86/splitlock for 6.2 spinics.net/lists/kernel/msg…

#Linux Adding New Control Since Its Splitlock Detector Is Wrecking Some #Steam Play #SteamDeck Games phoronix.com/news/Linux-Spli…

#kernel [GIT PULL] x86/splitlock for 6.2 spinics.net/lists/kernel/msg…

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#kernel [tip:x86/splitlock] BUILD SUCCESS 727209376f4998bc84db1d5d8af15afea846a92b spinics.net/lists/kernel/msg…