---
id: CVE-2026-101201
title: >-
  qt5-qtbase: qt6-qt5compat: qt: Denial of Service via out-of-bounds read in
  QBinaryJson (CVE-2026-101201)
summary: >-
  A flaw was found in Qt. An out-of-bounds read vulnerability can occur when
  parsing a binary file with a malformed header in the
  QBinaryJson::fromBinaryData() function. An attacker could exploit this flaw by
  convincing a user or application…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-125
  - CWE-190
vendor: Red Hat
product: Red Hat Enterprise Linux 7
affected:
  - enterprise_linux 10
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - hardened_images
published: '2026-10-20'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T19:20:43+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101201.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101201.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101201'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2556033'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101201'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101201'
  - url: 'https://codereview.qt-project.org/c/qt/qt5compat/+/758925'
  - url: 'https://codereview.qt-project.org/c/qt/qt5compat/+/759230'
  - url: >-
      https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-101201
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00165
epssPercentile: 0.05657
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T15:56:09.910743Z'
scores:
  vendor: 5.5
  cna: 4.3
ingestedAt: '2026-10-20T12:05:07.357Z'
---

## Overview

A flaw was found in Qt. An out-of-bounds read vulnerability can occur when parsing a binary file with a malformed header in the QBinaryJson::fromBinaryData() function. An attacker could exploit this flaw by convincing a user or application to process a specially crafted binary file, causing the application to crash and resulting in a Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101201.json)

**qt5-qtbase: qt6-qt5compat: qt: Denial of Service via out-of-bounds read in QBinaryJson** — rated Moderate by Red Hat. Released 2026-10-20, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images

Not affected:

- Red Hat Hardened Images

## Remediation

Fix deferred

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.