osv-2026-603
Vulnerability from osv_ossfuzz
Published
2026-04-21 00:05
Modified
2026-04-21 00:05
Summary
UNKNOWN READ in <wasmtime::runtime::func::Func>::call_unchecked_raw::<
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=504268343

Crash type: UNKNOWN READ
Crash state:
<wasmtime::runtime::func::Func>::call_unchecked_raw::<
<wasmtime::runtime::func::Func>::call_impl_do_call::<
wasmtime_internal_fiber::stackswitch::x86_64::wasmtime_fiber_start
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "fixed_range": "3250c98a2d60f87897d29ff3547ec5463ff245c4:eb7a3f61290ac9e82fe7d760fb569bb3f3fc657a",
        "introduced_range": "40da1d8c83e2c5e35ab5245ff4b7a5a9592422c1:d5f1b973e48b0016a2cd1190985c9fa509bf0cee"
      },
      "ecosystem_specific": {
        "severity": "MEDIUM"
      },
      "package": {
        "ecosystem": "OSS-Fuzz",
        "name": "wasmtime",
        "purl": "pkg:generic/wasmtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "d3f444c876d71724dca6b40a58a55e8a450a7967"
            },
            {
              "fixed": "eb7a3f61290ac9e82fe7d760fb569bb3f3fc657a"
            }
          ],
          "repo": "https://github.com/bytecodealliance/wasmtime",
          "type": "GIT"
        }
      ],
      "versions": []
    }
  ],
  "details": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=504268343\n\n```\nCrash type: UNKNOWN READ\nCrash state:\n\u003cwasmtime::runtime::func::Func\u003e::call_unchecked_raw::\u003c\n\u003cwasmtime::runtime::func::Func\u003e::call_impl_do_call::\u003c\nwasmtime_internal_fiber::stackswitch::x86_64::wasmtime_fiber_start\n```\n",
  "id": "OSV-2026-603",
  "modified": "2026-04-21T00:05:37.586785Z",
  "published": "2026-04-21T00:05:37.586369Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=504268343"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "UNKNOWN READ in \u003cwasmtime::runtime::func::Func\u003e::call_unchecked_raw::\u003c"
}


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