CVE-2025-58157 – github.com/consensys/gnark

Package

Manager: go
Name: github.com/consensys/gnark
Vulnerable Version: =0.12.0 || >=0.12.0 <0.13.0

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00054 pctl0.16936

Details

gnark affected by denial of service when computing scalar multiplication using fake-GLV algorithm ### Impact For optimizing the scalar multiplication algorithm in circuit for some curves, gnark uses fake-GLV algorithm in case the curve doesn't support true-GLV. For this to work, we need to compute the scalar decomposition using the Half GCD method in gnark-crypto. However, for some of the inputs the algorithm didn't converge quickly enough. In case the prover accepts untrusted witness, it could lead to denial of service as the prover gets stuck in a very slowly converging loop. Thanks to @feltroidprime for reporting the issue and proposing a fix. ### Patches The issue has been patched in gnark-crypto commit https://github.com/Consensys/gnark-crypto/commit/56600883e0e9f9b159e9c7000b94e76185ec3d0d. The dependency update is implemented in gnark commit https://github.com/Consensys/gnark/commit/68be6cede36e387ab760725beabd3c96cc94e6dc. ### Workarounds This update doesn't require recompiling the circuits as the issue is in the hint function. The users can update the gnark-crypto dependency to the fixed version. ### References * See bug report https://github.com/Consensys/gnark/issues/1483 * Fake GLV description https://ethresear.ch/t/fake-glv-you-dont-need-an-efficient-endomorphism-to-implement-glv-like-scalar-multiplication-in-snark-circuits/20394

Metadata

Created: 2025-08-29T20:20:13Z
Modified: 2025-09-01T20:05:35Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-9fvj-xqr2-xwg8/GHSA-9fvj-xqr2-xwg8.json
CWE IDs: ["CWE-400"]
Alternative ID: GHSA-9fvj-xqr2-xwg8
Finding: F211
Auto approve: 1