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    CVE-2023-31146

    Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, during codegen, the length word of a dynarray is written before the data, which can result in out-of-bounds array access in the case where the dynarray is on both the lhs and rhs of an assignment. The issue can cause data corruption across call frames. The expected behavior is to revert due to out-of-bounds array access. Version 0.3.8 contains a patch for this issue.

    Published:May 11, 2023
    Last Modified:Jan 24, 2025
    EPS:May 11, 2023
    EPSS Score:0.00165
    CVSS Score:7.5

    Affected Products

    Vendor
    Vyperlang
    Product
    Vyper

    Exploits

    https://github.com/vyperlang/vyper/security/advisories/GHSA-3p37-3636-q8wvhttps://github.com/vyperlang/vyper/security/advisories/GHSA-3p37-3636-q8wv

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2024-32647 (CVSS 5.3) — Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, us…
    CVE-2024-32646 (CVSS 5.3) — Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, us…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High