{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "scc",
        "purl": "pkg:cargo/scc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "3.8.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "In affected versions of this crate, `Array::insert` is not exception safe. In the `UPSERT` path, `key` and `value`\u0027s snapshot is written to `self.data_block`, and after the insertion is completed, `key` and `value` are `mem::forget` in order to prevent double free. However, during the insertion, `K::compare` is invoked, which is a user-provided method. If user deliberately call panic in this function, during unwinding, the destructors of `key`, `value`, and `self` will all be called (since the `mem::forget` has not been called yet), leading to Double Free. Similar issues happens in the `!UPSERT` path.\n\nThe soundness issue was fixed in version `3.8.4` by using `ManuallyDrop` instead of `mem::forget`, and separating fallible code from infallible code during a node split - insert = insert_try -\u003e insert_unchecked.",
  "id": "RUSTSEC-2026-0205",
  "modified": "2026-07-07T09:15:02Z",
  "published": "2026-07-06T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/scc"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0205.html"
    },
    {
      "type": "WEB",
      "url": "https://codeberg.org/wvwwvwwv/scalable-concurrent-containers/issues/232"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`Array::insert` violates exception safety if compare function panics, leading to potential Double-Free"
}