Vulnerability-Lookup

GHSA-J3W3-P6MR-3HRH

Vulnerability from github – Published: 2026-04-04 05:55 – Updated: 2026-04-04 05:55

Summary

DynFuture Drop Can Construct a Dangling Reference

Details

DynFuture is unsound because its Drop implementation transmutes a trait-object reference into unrelated reference types, which constructs an invalid reference from trait object metadata.

This issue was reproduced against dyn-future 3.0.4 under Miri. The crate is unmaintained.

Severity

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "dyn-future"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-843"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-04T05:55:51Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "DynFuture is unsound because its Drop implementation transmutes a trait-object reference into unrelated reference types, which constructs an invalid reference from trait object metadata.\n\nThis issue was reproduced against `dyn-future` 3.0.4 under Miri. The crate is unmaintained.",
  "id": "GHSA-j3w3-p6mr-3hrh",
  "modified": "2026-04-04T05:55:51Z",
  "published": "2026-04-04T05:55:51Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rustsec/advisory-db/issues/2595"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xacrimon/dyn-future"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0079.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "DynFuture Drop Can Construct a Dangling Reference"
}

RUSTSEC-2026-0079 (GHSA-J3W3-P6MR-3HRH)

Vulnerability from osv_rustsec – Published: 2026-01-21 12:00 – Updated: 2026-04-05 05:30 – Source website

Summary

`DynFuture` drop can construct a dangling reference

Details

DynFuture is unsound because its Drop implementation transmutes a trait-object reference into unrelated reference types, which constructs an invalid reference from trait object metadata.

This issue was reproduced against dyn-future 3.0.4 under Miri. And the crate is unmaintained.

References

URL

Type

	https://crates.io/crates/dyn-future	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2026-0079.html	ADVISORY
	https://github.com/rustsec/advisory-db/issues/2595	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "dyn-future",
        "purl": "pkg:cargo/dyn-future"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-j3w3-p6mr-3hrh"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "DynFuture is unsound because its Drop implementation transmutes a trait-object reference into unrelated reference types, which constructs an invalid reference from trait object metadata.\n\nThis issue was reproduced against `dyn-future` 3.0.4 under Miri. And the crate is unmaintained.",
  "id": "RUSTSEC-2026-0079",
  "modified": "2026-04-05T05:30:42Z",
  "published": "2026-01-21T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/dyn-future"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0079.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rustsec/advisory-db/issues/2595"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`DynFuture` drop can construct a dangling reference"
}

Sightings

Author	Source	Type	Date	Other

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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