CVE-2021-41121— Memory corruption in Vyper
Quick assessment
Affected
vyperlang vyper
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2021-41121
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Memory corruption in Vyper
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
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
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-41121
请登录查看更多情报信息。
Patches & Fixes for CVE-2021-41121 (1)
-
https://github.com/vyperlang/vyper/pull/2447 x_refsource_MISC
Vendor Advisories for CVE-2021-41121 (1)
-
https://github.com/vyperlang/vyper/security/advisories/GHSA-xv8x-pr4h-73jv x_refsource_CONFIRM
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-2026-55586
SumatraPDF: Heap out-of-bounds write in vendored CHMLib LZX -
CVE-2026-18294
OriginLab Origin Viewer OGW File Parsing Memory Corruption R -
CVE-2026-18292
OriginLab OriginPro OGG File Parsing Memory Corruption Remot -
CVE-2026-18291
OriginLab OriginPro OGW File Parsing Memory Corruption Remot -
CVE-2026-76987
liftoff-sr CIPster Generic Attribute Logic ciptypes.h SetAtt
V. Comments for CVE-2021-41121
No comments yet