rustsec-2026-0123
Vulnerability from osv_rustsec
Published
2026-05-02 12:00
Modified
2026-05-12 17:04
Summary
Out-of-bounds read in `bytes_helper` public safe functions
Details

The bytes_helper module contains multiple public functions (into_arr4(), into_arr2(), u8_from_le_bytes()) that use slice.get_unchecked(pos..pos + N) without verifying that pos + N <= slice.len(). These are public safe API functions, allowing any caller to trigger undefined behavior by passing invalid positions.

For example, calling into_arr4(&data, 10) where data is a 3-byte slice causes an out-of-bounds access since position 10 exceeds the slice length.


{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "rustdx",
        "purl": "pkg:cargo/rustdx"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.4.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The `bytes_helper` module contains multiple public functions\n(`into_arr4()`, `into_arr2()`, `u8_from_le_bytes()`) that use\n`slice.get_unchecked(pos..pos + N)` without verifying that\n`pos + N \u003c= slice.len()`. These are public safe API functions, allowing any\ncaller to trigger undefined behavior by passing invalid positions.\n\nFor example, calling `into_arr4(\u0026data, 10)` where `data` is a 3-byte slice\ncauses an out-of-bounds access since position 10 exceeds the slice length.",
  "id": "RUSTSEC-2026-0123",
  "modified": "2026-05-12T17:04:47Z",
  "published": "2026-05-02T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/rustdx"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0123.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/zjp-CN/rustdx/issues/38"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Out-of-bounds read in `bytes_helper` public safe functions"
}


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