Summary
VVE-2021-0001: Memory corruption using function calls within arrays
Impact
When performing a function call inside an array, there is a memory corruption issue that occurs because of an incorrect pointer to the the tip of the stack.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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This issue was partially fixed in VVE-2020-0004, however the fix did not update similar code for arrays, which had a similar issue. The issue is fully fixed in https://github.com/vyperlang/vyper/pull/2345
Frequently Asked Questions
- What is GHSA-22WC-C9WJ-6Q2V? GHSA-22WC-C9WJ-6Q2V is a medium-severity security vulnerability in vyper (pip), affecting versions < 0.2.12. It is fixed in 0.2.12.
- Which versions of vyper are affected by GHSA-22WC-C9WJ-6Q2V? vyper (pip) versions < 0.2.12 is affected.
- Is there a fix for GHSA-22WC-C9WJ-6Q2V? Yes. GHSA-22WC-C9WJ-6Q2V is fixed in 0.2.12. Upgrade to this version or later.
- Is GHSA-22WC-C9WJ-6Q2V exploitable, and should I be worried? Whether GHSA-22WC-C9WJ-6Q2V is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-22WC-C9WJ-6Q2V is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-22WC-C9WJ-6Q2V? Upgrade
vyperto 0.2.12 or later.