CVE-2025-66559 (GCVE-0-2025-66559)
Vulnerability from cvelistv5 – Published: 2025-12-04 22:23 – Updated: 2025-12-05 17:29
VLAI
EPSS
VEX
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
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
References
2 references
| URL | Tags |
|---|---|
| https://github.com/taikoxyz/taiko-mono/security/a… | x_refsource_CONFIRM |
| https://github.com/taikoxyz/taiko-mono/commit/379… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| taikoxyz | taiko-mono |
Affected:
<= 2.3.1
|
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