Bug 2558013 (CVE-2021-48020) - CVE-2021-48020 vyper: vyper: Memory corruption via internal function calls within arrays
Summary: CVE-2021-48020 vyper: vyper: Memory corruption via internal function calls wi...
Keywords:
Status: NEW
Alias: CVE-2021-48020
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2565625
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-21 01:00 UTC by OSIDB Bzimport
Modified: 2026-11-03 07:47 UTC (History)
0 users

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Description OSIDB Bzimport 2026-10-21 01:00:18 UTC 
Vyper from 0.1.0b4 before 0.3.0 contains a memory corruption vulnerability caused by an incorrect stack tip pointer when internal function calls are performed inside arrays. Contracts placing internal calls in nested array elements, external call arguments, struct literals, or raw_log topics can have memory corrupted, producing incorrect contract behavior.
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