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Advisory record · GHSA-2cgv-28vr-rv6j

libcrux incorrectly calculates on aarch64

CVSS 4.0, no score published

Published by the GitHub Advisory Database at 4 Dec 2025, 17:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
libcrux-intrinsicscrates.io>=0.0.3, <0.0.40.0.4
libcrux-ml-kemcrates.io>=0.0.3, <0.0.40.0.4
libcrux-ml-dsacrates.io>=0.0.3, <0.0.40.0.4
Identifiers
GHSA-2cgv-28vr-rv6j · RUSTSEC-2025-0133
Weakness (CWE)
CWE-200 · CWE-327
Tags
Published
4 Dec 2025
Updated
22 Feb 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Affected versions of libcrux-intrinsics, libcrux-ml-kem and libcrux-ml-dsa from 0.0.3 up to but not including 0.0.4 are affected. On platforms lacking the vxarq_u64 aarch64 intrinsic, an unverified fallback in libcrux-intrinsics produced wrong SHA-3 results, causing libcrux-ml-kem and libcrux-ml-dsa to yield incorrect shared secrets and invalid signatures. The source does not describe attacker requirements. Upgrade all three packages to 0.0.4.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
Not published None 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 15:19 UTC First seen by agentprime
  2. 31 Oct 2026, 15:19 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.