# CVE-2026-101201: qt6-5compat: A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of o...

CVE-2026-101201 is fixed in 13 products on 1 platform, first by DEBIAN-CVE-2026-101201, released November 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-101201
- Priority: Routine
- CVSS: n/a (low)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 20, 2026

## Description

A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mingw-qt5-qtbase Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw-qt5-qtbase-debuginfo Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw32-qt5-qmake Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw32-qt5-qtbase Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw32-qt5-qtbase-debuginfo Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw32-qt5-qtbase-devel Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw32-qt5-qtbase-static Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw64-qt5-qmake Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw64-qt5-qtbase Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw64-qt5-qtbase-debuginfo Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw64-qt5-qtbase-devel Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | mingw64-qt5-qtbase-static Fedora 43 | 5.15.18-5.fc43 | [FEDORA-2026-14092CFBB4](https://patchblox.com/security/data/fix/linux/fedora-2026-14092cfbb4.md) | Nov 9, 2026 |
| Linux | qt6-5compat Debian 14 | 6.11.2-3 | [DEBIAN-CVE-2026-101201](https://patchblox.com/security/data/fix/linux/debian-cve-2026-101201.md) | Nov 9, 2026 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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