Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used `math.ceil(type_.size_in_bytes / 32)`. The intermediate floating point step can produce a rounding error if there are enough bits set in the IEEE-754 mantissa. Roughly speaking, if `type_.size_in_bytes` is large (> 2**46), and slightly less than a power of 2, the calculation can overestimate how many slots are needed by 1. If `type_.size_in_bytes` is slightly more than a power of 2, the calculation can underestimate how many slots are needed by 1. This issue is patched in version 0.3.8.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-12-13T19:39:22.626Z

Updated: 2024-08-02T20:37:40.156Z

Reserved: 2023-10-19T20:34:00.948Z

Link: CVE-2023-46247

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-12-13T20:15:49.360

Modified: 2024-11-21T08:28:09.720

Link: CVE-2023-46247

cve-icon Redhat

No data.