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CVE-2026-24850

MEDIUM

5.3

Description

The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto `ml-dsa` crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be **strictly increasing**. The current implementation uses a non-strict monotonic check (`<=` instead of `<`), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict `<` comparison to `<=`, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue.

Details CVE

Score CVSS v3.15.3

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie1/28/2026

Derniere modification1/29/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-347

References

https://csrc.nist.gov/pubs/fips/204/final(security-advisories@github.com)

https://datatracker.ietf.org/doc/html/rfc9881(security-advisories@github.com)

https://github.com/C2SP/wycheproof(security-advisories@github.com)

https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json(security-advisories@github.com)

https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json(security-advisories@github.com)

https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json(security-advisories@github.com)

https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a(security-advisories@github.com)

https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38(security-advisories@github.com)

https://github.com/RustCrypto/signatures/issues/894(security-advisories@github.com)

https://github.com/RustCrypto/signatures/pull/895(security-advisories@github.com)

https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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