Vyper: Memory corruption using function calls within tuples / nested calls
Description
A memory corruption vulnerability exists in Vyper versions prior to 0.2.6 when performing function calls inside tuples or nested function calls. This occurs due to an incorrect pointer to the tip of the stack during such calls. The issue was fixed in Vyper version 0.2.6.
CVSS v4.0
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability involves memory corruption triggered by function calls within tuples or as arguments inside other function calls in Vyper smart contracts. The root cause is an incorrect pointer referencing the tip of the stack, leading to unsafe memory operations. This flaw was addressed and resolved in pull request #2186 and included in the Vyper 0.2.6 release.
Potential Impact
Exploitation of this vulnerability can cause memory corruption during contract execution, potentially leading to unexpected behavior or incorrect return values. There is no indication of privilege escalation, remote code execution, or data leakage from the provided information.
Mitigation Recommendations
Upgrade to Vyper version 0.2.6 or later, where this memory corruption issue has been fixed. No additional mitigation steps are required as the patch fully addresses the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2r3x-4mrv-mcxf
- Osv Schema Version
- 1.4.0
- Ecosystems
- ["PyPI"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6ac523782cdf04f656c4bf5a
Added to database: 10/06/2026, 16:36:08 UTC
Last enriched: 10/06/2026, 16:48:56 UTC
Last updated: 10/06/2026, 16:48:56 UTC
Views: 13
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