Vulnerability-Lookup

GHSA-XV5C-VG59-HJ7X

Vulnerability from github – Published: 2025-06-11 09:30 – Updated: 2025-06-11 09:30

Details

There is a "Use After Free" vulnerability in Qt's QHttp2ProtocolHandler in the QtNetwork module. This only affects HTTP/2 handling, HTTP handling is not affected by this at all. This happens due to a race condition between how QHttp2Stream uploads the body of a POST request and the simultaneous handling of HTTP error responses.

This issue only affects Qt 6.9.0 and has been fixed for Qt 6.9.1.

Severity

2.1 (Low)


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

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  "affected": [],
  "aliases": [
    "CVE-2025-5991"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
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    "nvd_published_at": "2025-06-11T08:15:22Z",
    "severity": "LOW"
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  "id": "GHSA-xv5c-vg59-hj7x",
  "modified": "2025-06-11T09:30:32Z",
  "published": "2025-06-11T09:30:32Z",
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    },
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      "type": "CVSS_V4"
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}

CVE-2025-5991 (GCVE-0-2025-5991)

Vulnerability from cvelistv5 – Published: 2025-06-11 07:33 – Updated: 2026-07-29 08:33

Title

Use after free in QHttp2ProtocolHandler

Summary

Severity

2.1 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-11 13:17 UTC

CWE

CWE-416 - Use After Free

Assigner

TQtC CNA

CNA scorecard – unranked: 7 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://codereview.qt-project.org/c/qt/qtbase/+/643777

Impacted products

1 product

Vendor	Product	Version
Qt	Qt	Unaffected: 0 , < 6.9.0 (python) Affected: 6.9.0 Unaffected: 6.9.1 cpe:2.3:a:qt:qt:6.9.0:::::::*

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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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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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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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