CVE-2021-41121— Memory corruption in Vyper
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I. Basic Information for CVE-2021-41121
Vulnerability Information
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Vulnerability Title
Memory corruption in Vyper
Source: NVD (National Vulnerability Database)
Vulnerability Description
Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions when performing a function call inside a literal struct, there is a memory corruption issue that occurs because of an incorrect pointer to the the top of the stack. This issue has been resolved in version 0.3.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
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 存在缓冲区错误漏洞，该漏洞源于指向堆栈顶部的指针不正确，会出现内存损坏问题。
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-2021-41121
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- https://github.com/vyperlang/vyper/pull/2447x_refsource_MISC
- https://github.com/vyperlang/vyper/security/advisories/GHSA-xv8x-pr4h-73jvx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-41121
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
Same weakness: CWE-119
- CVE-2026-22167
GPU DDK - Cache resident PM buffers writable by other GPU re - CVE-2026-27890
Firebird has Pre-Auth DOS when Processing Out of Order CNCT_ - CVE-2026-34864
Huawei HarmonyOS 安全漏洞 - CVE-2026-4149
Sonos Era 300 SMB Response Out-Of-Bounds Access Remote Code - CVE-2026-34988
Wasmtime leaks data between pooling allocator instances
V. Comments for CVE-2021-41121
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