rustsec-2025-0051
Vulnerability from osv_rustsec
Published
2025-08-05 12:00
Modified
2025-10-28 06:02
Summary
`xcb::Connection::connect_to_fd*` functions violate I/O safety
Details

The API of xcb::Connection has constructors which allow an arbitrary RawFd to be used as a socket connection. On either failure of these constructors or on the drop of Connection, it closes the associated file descriptor. Thus, a program which uses an OwnedFd (such as a UnixStream) as the file descriptor can close the file descriptor and continue to attempt using it or close an already-closed file descriptor, violating I/O safety.

Starting in version 1.6.0, xcb provides Connection::connect_with_fd and Connection::connect_with_fd_and_extensions as safe alternatives and deprecates the problematic functions.

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "xcb::Connection::connect_to_fd",
            "xcb::Connection::connect_to_fd_with_extensions"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "xcb",
        "purl": "pkg:cargo/xcb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "1.6.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-655h-hg88-5qmf"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The API of `xcb::Connection` has constructors which allow an arbitrary `RawFd`\nto be used as a socket connection. On either failure of these constructors or\non the drop of `Connection`, it closes the associated file descriptor. Thus, a\nprogram which uses an `OwnedFd` (such as a `UnixStream`) as the file descriptor\ncan close the file descriptor and continue to attempt using it or close an\nalready-closed file descriptor, violating I/O safety.\n\nStarting in version 1.6.0, `xcb` provides `Connection::connect_with_fd` and\n`Connection::connect_with_fd_and_extensions` as safe alternatives and\ndeprecates the problematic functions.",
  "id": "RUSTSEC-2025-0051",
  "modified": "2025-10-28T06:02:18Z",
  "published": "2025-08-05T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/xcb"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0051.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rust-x-bindings/rust-xcb/issues/282"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rust-x-bindings/rust-xcb/issues/167"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-x-bindings/rust-xcb/pull/283"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`xcb::Connection::connect_to_fd*` functions violate I/O safety"
}


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