Security advisory

{
  "id": "920362a33048579b93c41f19af0e95f5a4fbdf48ea6b327a4697c4ed0ae9fc07",
  "url": "https://osv.dev/vulnerability/CVE-2021-26305",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-26305",
    "summary": "An issue was discovered in Deserializer::read_vec in the cdr crate before 0.2.4 for Rust. A user-provided Read implementation can gain access to the old contents of newly allocated heap memory, violating soundness.",
    "evidence": "osv:CVE-2021-26305",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-26305",
      "aliases": [
        "CVE-2021-26305",
        "GHSA-37jj-wp7g-7wj4",
        "RUSTSEC-2021-0012"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hrektts/cdr-rs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b143a8ba034b73637db078eec942e4c63bd52fc3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cdr_project:cdr:*:*:*:*:*:rust:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.2.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.2.3",
            "v0.2.2",
            "v0.2.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26305.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:42.574506885Z",
      "provider": "osv",
      "references": [
        "https://rustsec.org/advisories/RUSTSEC-2021-0012.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-26305",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435413,
  "published_at": "2021-01-29T03:15:12.363+00:00"
}