libsodium 1.0.21 security fixes

{
  "id": "f21d6986ee81dcf5830542017e468160df6bbb76ed1d733c4ba8ebd366f20e6a",
  "url": "https://github.com/jedisct1/libsodium/releases/tag/1.0.21-RELEASE",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "libsodium 1.0.21 security fixes",
    "summary": "libsodium 1.0.21 includes security fixes from 1.0.20-stable, including rejecting small-order Ed25519 points outside the main subgroup, preventing compiler-introduced side channels in critical code paths, and adding memory fences after AEAD MAC verification.",
    "evidence": "Version 1.0.21 This point release includes all the changes from 1.0.20-stable, which include a security fix for the crypto_core_ed25519_is_valid_point() function",
    "products": [
      {
        "name": {
          "value": "libsodium",
          "evidence": "Release notes from libsodium"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.0.21",
            "evidence": "Version 1.0.21"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "github-jedisct1-libsodium",
  "document_id": 21449,
  "published_at": "2026-01-06T16:45:41+00:00"
}