What is CVE-2023-31146?

CVE-2023-31146 is a high-severity vulnerability in Vyperlang Vyper, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-05-11.

How severe is CVE-2023-31146?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Vyperlang Vyper

CVE-2023-31146

Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, during codegen, the length word of a dynarray is written before the data, which can result in out-of-bounds array access in the case wher…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (54.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Vyperlang Vyper — versions < 0.3.8

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

https://github.com/vyperlang/vyper/security/advisories/GHSA-3p37-3636-q8wv (x_refsource_CONFIRM)
https://github.com/vyperlang/vyper/commit/4f8289a81206f767df1900ac48f485d90fc87edb (x_refsource_MISC)

Frequently asked questions

What is CVE-2023-31146?: CVE-2023-31146 is a high-severity vulnerability in Vyperlang Vyper, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-05-11.
How severe is CVE-2023-31146?: High severity. CVSS v3 base score is 7.5 out of 10.