GHSA-RRMW-GV85-W824

Vulnerability from github – Published: 2025-06-19 18:31 – Updated: 2026-06-09 19:09
VLAI
Summary
pywasm3 has Improper Restriction of Operations within the Bounds of a Memory Buffer
Details

A vulnerability has been found in wasm3 0.5.0 and classified as problematic. This vulnerability affects the function MarkSlotAllocated of the file source/m3_compile.c. The manipulation leads to out-of-bounds write. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.

Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1.9 (Low)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pywasm3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-6272"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-09T19:09:31Z",
    "nvd_published_at": "2025-06-19T18:15:22Z",
    "severity": "LOW"
  },
  "details": "A vulnerability has been found in wasm3 0.5.0 and classified as problematic. This vulnerability affects the function MarkSlotAllocated of the file source/m3_compile.c. The manipulation leads to out-of-bounds write. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.",
  "id": "GHSA-rrmw-gv85-w824",
  "modified": "2026-06-09T19:09:31Z",
  "published": "2025-06-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6272"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wasm3/wasm3/issues/531"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/pywasm3/PYSEC-2025-186.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/user-attachments/files/19516600/wasm3_crash.txt"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/wasm3/pywasm3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wasm3/pywasm3/blob/main/wasm3/m3_compile.c#L333"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.313276"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.313276"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.593008"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "pywasm3 has Improper Restriction of Operations within the Bounds of a Memory Buffer"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.