GHSA-434v-x5qv-pmh6

Source

https://github.com/advisories/GHSA-434v-x5qv-pmh6

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-434v-x5qv-pmh6/GHSA-434v-x5qv-pmh6.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-434v-x5qv-pmh6

Aliases

RUSTSEC-2026-0075

Published

2026-03-26T17:58:55Z

Modified

2026-03-27T06:11:21Z

Severity

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

Summary

libcrux has All-Zero Key Generation Upon Catastrophic RNG Failure

Details

The libcrux-ed25519 key generation samples Ed25519 secret keys from a provided CSPRNG in a loop for up to 100 attempts until a non-zero key is found. If a non-zero key could not be sampled within 100 attempts the key generation function would silently continue with an all-zero buffer as the secret key.

Impact

This bug only occurs in the event of a catastrophic failure of the CSPRNG, but would allow anyone to forge signatures under the resulting static signing key.

Mitigation

Instead of silently continuing with an all-zero signing key, starting from version 0.0.7 key generation will error in the case of 100 failed attempts at sampling a valid key.

Database specific

{
    "cwe_ids":  [
        "CWE-1240",
        "CWE-331",
        "CWE-392"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-03-26T17:58:55Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}

References

Affected packages

crates.io / libcrux-ed25519

Package

Name: libcrux-ed25519; View open source insights on deps.dev
Purl: pkg:cargo/libcrux-ed25519

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.0.7

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-434v-x5qv-pmh6/GHSA-434v-x5qv-pmh6.json"