RUSTSEC-2026-0329

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0329

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0329.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0329

Published

2026-08-03T12:00:00Z

Modified

2026-10-07T08:30:02Z

Severity

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

Summary

Auto-Reseeding HMAC-DRBG could panic for some output lengths

Details

The automatically reseeding implementations of HMAC-DRBG would panic if called with a desired non-zero output length cleanly divisible by 65_536, the maximum number of output bytes that can be generated before reseeding has to happen.

Impact

An application relying on libcrux-hmac-drgb to provide randomness of byte length a non-zero integer multiple of 65_536 in a single call to fill_bytes would panic.

Any calls with output buffer lengths not cleanly divisible by 65_536 are not affected.

Mitigation

With release the release of version 0.0.2 of libcrux-hmac-drbg this bug has been fixed and reseeding DRBG implementations can be used with arbitrary output lengths.

We recommend users upgrade to libcrux-hmac-drbg version 0.0.2.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / libcrux-hmac-drbg

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.0.2

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "arch": [],
        "functions": [
            "libcrux_hmac_drbg::HmacDrbgRng::fill_bytes"
        ],
        "os": []
    }
}