Reported

April 27, 2026

Issued

May 13, 2026

Package

libcrux-ml-dsa (crates.io)

Type

INFO Notice

References

• https://github.com/cryspen/libcrux/pull/1395

Patched

• >=0.0.9

Affected Architectures

• x86_64

Description

The AVX2 implementation of ML-DSA did not fully reduce intermediate inputs to the inverse NTT, which leads to a testable difference in panic behaviour of internal functions compared to the portable implementation.

Impact

We are not aware of inputs to the public key generation, signing or verification APIs that trigger a panic in the AVX2 implementation because the intermediate values were not fully reduced.

Mitigation

From version 0.0.9 intermediate values on AVX2 platforms are fully reduced in alignment with the portable implementation.

Advisory available under CC0-1.0 license.