Github.com/supranational/blst: blst cryptographic library: denial of service via out-of-bounds stack write in key generation_CVE-2026-2681

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    "lastseen": "",
    "description": "A flaw was found in the blst cryptographic library. This out-of-bounds stack write vulnerability, specifically in the blst_sha256_bcopy assembly routine, occurs due to a missing zero-length guard. A remote attacker can exploit this by providing a zero-length salt parameter to key generation functions, such as blst_keygen_v5(), if the application exposes this functionality. Successful exploitation leads to memory corruption and immediate process termination, resulting in a denial-of-service (DoS) condition.",
    "published": "2026-02-19T06:58:47.090Z",
    "modified": "2026-02-19T06:58:47.090Z",
    "type": "cve",
    "title": "Github.com/supranational/blst: blst cryptographic library: denial of service via out-of-bounds stack write in key generation",
    "source": "fedora",
    "references": "https://access.redhat.com/security/cve/CVE-2026-2681\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2440580",
    "id": "CVE-2026-2681",
    "bulletinFamily": "",
    "cwe": [
        "CWE-787"
    ],
    "cvelist": null,
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    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
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    "category_name": "CVE",
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