CVE-2023-31146— Vyper vulnerable to OOB DynArray access when array is on both LHS and RHS of an assignment
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I. Basic Information for CVE-2023-31146
Vulnerability Information
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Vulnerability Title
Vyper vulnerable to OOB DynArray access when array is on both LHS and RHS of an assignment
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
Vyper 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vyper是EVM 的 Pythonic 智能合约语言。 Vyper 0.3.8之前版本存在缓冲区错误漏洞。攻击者利用该漏洞导致数组访问越界。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-31146
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- https://github.com/vyperlang/vyper/security/advisories/GHSA-3p37-3636-q8wvx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-31146
Same Patch Batch · vyperlang · 2023-05-11 · 3 CVEs total
| CVE-2023-32058 | 7.5 HIGH | Vyper vulnerable to integer overflow in loop |
| CVE-2023-32059 | 7.5 HIGH | Vyper vulnerable to incorrect ordering of arguments for kwargs passed to internal calls |
IV. Related Vulnerabilities
Same product: vyper
- CVE-2025-47774
Vyper's `slice()` may elide side-effects when output length - CVE-2025-47285
Vyper's `concat()` builtin may elide side-effects for zero-l - CVE-2025-26622
sqrt doesn't define rounding behavior in Vyper - CVE-2025-27104
double eval in For List Iter in Vyper - CVE-2025-27105
AugAssign evaluation order causing OOB write within the obje
Same vendor: vyperlang
- CVE-2025-47774
Vyper's `slice()` may elide side-effects when output length - CVE-2025-47285
Vyper's `concat()` builtin may elide side-effects for zero-l - CVE-2025-26622
sqrt doesn't define rounding behavior in Vyper - CVE-2025-27104
double eval in For List Iter in Vyper - CVE-2025-27105
AugAssign evaluation order causing OOB write within the obje
V. Comments for CVE-2023-31146
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