Vulnerability-Lookup

GHSA-VCV3-3VWP-2J63

Vulnerability from github – Published: 2026-10-14 06:31 – Updated: 2026-10-14 06:31

Details

A defect in the Qt for MCUs core string handling causes heap memory corruption. When an application passes text into Qt Quick Ultralite using the public Qul::String interface type, and that text is held in a std::string, the conversion to the internal string type copies the pointer without taking ownership of it. Two objects then release the same memory, producing a double free, an invalid free, or a use-after-free.

Severity

6.5 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:H/E:U/S:P/AU:N/R:U/V:D/RE:M

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{
  "affected": [],
  "aliases": [
    "CVE-2026-94370"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-14T06:17:07Z",
    "severity": "MODERATE"
  },
  "details": "A defect in the Qt for MCUs core string handling causes heap memory corruption. When an application passes text into Qt Quick Ultralite using the public Qul::String interface type, and that text is held in a std::string, the conversion to the internal string type copies the pointer without taking ownership of it. Two objects then release the same memory, producing a double free, an invalid free, or a use-after-free.",
  "id": "GHSA-vcv3-3vwp-2j63",
  "modified": "2026-10-14T06:31:16Z",
  "published": "2026-10-14T06:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94370"
    },
    {
      "type": "WEB",
      "url": "https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-94370:"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:U/V:D/RE:M/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-94370 (GCVE-0-2026-94370)

Vulnerability from cvelistv5 – Published: 2026-10-14 05:43 – Updated: 2026-10-14 16:02

Title

Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs

Summary

Severity

6.5 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:H/E:U/S:P/AU:N/R:U/V:D/RE:M

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 16:02 UTC

CWE

CWE-415 - Double Free
CWE-416 - Use After Free
CWE-590 - Free of Memory not on the Heap
CWE-665 - Improper Initialization

Assigner

Qt CNA under the mitre root

CNA scorecard A 90/100 over 10 records in the last 180 days details

References

1 reference

URL	Tags
https://wiki.qt.io/List_of_known_vulnerabilities_…	issue-tracking

Impacted products

1 product

Vendor	Product	Version
qt	Qt_for_MCUs	Affected: 2.12.1 , < 2.12.3 (python) cpe:2.3:a:qt:qt_for_mcus::::::::

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JSON

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                "role": "CISA Coordinator",
                "timestamp": "2026-10-14T16:02:10.297104Z",
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Sightings

Author	Source	Type	Date	Other

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.

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