Bug 2565615

Summary: CVE-2020-37286 vyper: vyper: Memory corruption via nested internal function calls [fedora-all]
Product: [Fedora] Fedora Reporter: TEJ RATHI <trathi>
Component: vyperAssignee: Peter Lemenkov <lemenkov>
Status: CLOSED CURRENTRELEASE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: lemenkov
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["e9d2ab65-ee8a-4667-9de8-8b20feaf12aa"]}
Fixed In Version: vyper-0.3.0 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-11-03 07:42:48 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2557992    

Description TEJ RATHI 2026-11-03 07:39:19 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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 appear inside tuples or nested calls. Contracts using such calls as tuple elements, call arguments, or builtin arguments like concat or ecrecover can return corrupted values or pass wrong arguments to external calls.
Comment 1 Peter Lemenkov 2026-11-03 07:42:48 UTC 
This was fixed upstream in vyper 0.3.0 (GHSA-2r3x-4mrv-mcxf, published 2020-10-10).

All Fedora releases ship vyper 0.4.3, which already contains the fix and is not affected.