CVE catalog

CVE-2026-95620

qt6-base affected and fixed versions

A use-after-free vulnerability in the Qt QNetworkAccessManager HTTP/2 client support of the Qt Network module allows a malicious or compromised HTTP/2 server to cause the client application to crash, affecting availability.

Severity: Medium
Published: Oct 23, 2026, 12:18:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.23% · Oct 27, 2026

Projects and upstream resources

[qt6-scxml][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "qt6-base",
      "status": "vulnerable",
      "release": "sid",
      "version": "6.11.2+dfsg-7"
    },
    {
      "name": "qt6-base",
      "status": "vulnerable",
      "release": "forky",
      "version": "6.11.2+dfsg-5"
    },
    {
      "name": "qt6-base",
      "status": "not affected",
      "release": "trixie",
      "version": "6.8.2+dfsg-9+deb13u2"
    },
    {
      "name": "qt6-base",
      "status": "not affected",
      "release": "bookworm",
      "version": "6.4.2+dfsg-10"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "qt6-base",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "qt6-base",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "qt6-base",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "qt6-base",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "qt6-base",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "6.2.2+dfsg-5ubuntu1",
        "6.2.2+dfsg-6ubuntu1",
        "6.2.2+dfsg-6ubuntu2",
        "6.2.4+dfsg-1ubuntu1",
        "6.2.4+dfsg-2ubuntu1",
        "6.2.4+dfsg-2ubuntu1.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-95620"
    },
    {
      "name": "qt6-base",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "6.4.2+dfsg-18",
        "6.4.2+dfsg-19",
        "6.4.2+dfsg-19build1",
        "6.4.2+dfsg-20",
        "6.4.2+dfsg-21",
        "6.4.2+dfsg-21.1build4",
        "6.4.2+dfsg-21.1build5"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-95620"
    },
    {
      "name": "qt6-base",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "6.10.2+dfsg-7",
        "6.10.2+dfsg-14ubuntu2",
        "6.10.2+dfsg-15",
        "6.10.2+dfsg-16",
        "6.11.2+dfsg-4ubuntu2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-95620"
    },
    {
      "name": "qt6-base",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "6.9.2+dfsg-1ubuntu1",
        "6.9.2+dfsg-2",
        "6.9.2+dfsg-3ubuntu1",
        "6.9.2+dfsg-3ubuntu2",
        "6.9.2+dfsg-4",
        "6.10.2+dfsg-3",
        "6.10.2+dfsg-6",
        "6.10.2+dfsg-7"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-95620"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libqt6concurrent6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6core6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6dbus6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6gui6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6network6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6opengl6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6opengl6-dev]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6openglwidgets6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6printsupport6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6sql6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6sql6-ibase]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6sql6-mysql]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6sql6-odbc]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6sql6-psql]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6sql6-sqlite]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6test6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6widgets6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[libqt6xml6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[qmake6]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
[qmake6-bin]Unknown
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm

Next results

Observed: Oct 28, 2026, 5:47:48 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]