RUSTSEC-2026-0327 (GHSA-32H6-97MM-8Q3C)

Vulnerability from osv_rustsec – Published: 2026-10-02 12:00 – Updated: 2026-10-02 20:27 – Source website
VLAI
Summary
Wasmtime component async-lifted callback result count is unvalidated, causing a native stack buffer overflow
Details

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c For more information see the GitHub-hosted security advisory.

Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "wasmtime",
        "purl": "pkg:cargo/wasmtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "39.0.0"
            },
            {
              "fixed": "48.0.4"
            },
            {
              "introduced": "49.0.0"
            },
            {
              "fixed": "49.0.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-32h6-97mm-8q3c"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c\nFor more information see the GitHub-hosted security advisory.",
  "id": "RUSTSEC-2026-0327",
  "modified": "2026-10-02T20:27:46Z",
  "published": "2026-10-02T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/wasmtime"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0327.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bytecodealliance/wasmtime/pull/14471"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Wasmtime component async-lifted callback result count is unvalidated, causing a native stack buffer overflow"
}



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