{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "tokio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.21.0"
            },
            {
              "fixed": "1.24.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "tokio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.19.0"
            },
            {
              "fixed": "1.20.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "tokio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.2.0"
            },
            {
              "fixed": "1.18.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-04T00:30:37Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "`tokio::io::ReadHalf\u003cT\u003e::unsplit` can violate the `Pin` contract\n\nThe soundness issue is described in the [tokio/issues#5372](https://github.com/tokio-rs/tokio/issues/5372)\n\nSpecific set of conditions needed to trigger an issue (a !Unpin type in ReadHalf)\nis unusual, combined with the difficulty of making any arbitrary use-after-free\nexploitable in Rust without doing a lot of careful alignment of data types in\nthe surrounding code.\n\nThe `tokio` feature `io-util` is also required to be enabled to trigger this\nsoundness issue.\n\nThanks to zachs18 reporting the issue to Tokio team responsibly and taiki-e\nand carllerche appropriately responding and fixing the soundness bug.\n\nTokio before 0.2.0 used `futures` 0.1 that did not have `Pin`, so it is not\naffected by this issue.\n",
  "id": "GHSA-4q83-7cq4-p6wg",
  "modified": "2023-02-04T00:30:37Z",
  "published": "2023-02-04T00:30:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tokio-rs/tokio/issues/5372"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tokio-rs/tokio"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2023-0005.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "`tokio::io::ReadHalf\u003cT\u003e::unsplit` is Unsound"
}