RUSTSEC-2026-0330

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0330

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0330.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0330

Published

2026-09-28T12:00:00Z

Modified

2026-10-07T08:30:02Z

Severity

5.6 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Hybrid Encapsulation from Seed Panics on Short Seed

Details

For a hybrid KEM public key of type PublicKey::WingKemDraft06 or PublicKey::X25519MlKem768Draft06, the PublicKey::encapsulate_derand function would panic in an indexing operation on a seed input of length shorter than 32 bytes.

Impact

Applications encapsulating with an attacker controlled seed value could be made to panic. Since the encapsulation seed should be considered a secret of the encapsulating party for the KEM to remain secure, an application should never take the seed value from a potentially attacker controlled source.

Mitigation

With release of version 0.0.10 of libcrux-kem this bug has been fixed and the serialization functions return InvalidPrivateKey and InvalidPublicKey errors on invalid input buffer lengths.

We recommend users upgrade to libcrux-kem version 0.0.10.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / libcrux-kem

Package

Name: libcrux-kem; View open source insights on deps.dev
Purl: pkg:cargo/libcrux-kem

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.0.10

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "arch": [],
        "functions": [
            "libcrux_kem::PublicKey::encapsulate_derand"
        ],
        "os": []
    }
}