CVE-2025-66559 (GCVE-0-2025-66559)

Vulnerability from cvelistv5 – Published: 2025-12-04 22:23 – Updated: 2025-12-05 17:29
VLAI
Title
Taiko Alethia Pacaya inbox verification pointer corruption
Summary
Taiko Alethia is an Ethereum-equivalent, permissionless, based rollup designed to scale Ethereum without compromising its fundamental properties. In 2.3.1 and earlier, TaikoInbox._verifyBatches (packages/protocol/contracts/layer1/based/TaikoInbox.sol:627-678) advanced the local tid to whatever transition matched the current blockHash before knowing whether that batch would actually be verified. When the loop later broke (e.g., cooldown window not yet passed or transition invalidated), the function still wrote that newer tid into batches[lastVerifiedBatchId].verifiedTransitionId after decrementing batchId. Result: the last verified batch could end up pointing at a transition index from the next batch (often zeroed), corrupting the verified chain pointer.
Severity
8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-05 17:28 UTC
CWE
  • CWE-129 - Improper Validation of Array Index
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7619 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
taikoxyz taiko-mono Affected: <= 2.3.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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