---
id: CVE-2025-3512
title: There is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter
summary: >-
  There is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter.
  This requires an incorrectly formatted markdown file to be passed to
  QTextMarkdownImporter to trigger the overflow.


  This issue affects Qt from 6.8.0 to 6.8.4.…
severity: none
cwe:
  - CWE-122
published: '2025-04-11'
updated: '2026-07-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-3512'
references:
  - url: 'https://codereview.qt-project.org/c/qt/qtbase/+/635546'
    label: a59d8014-47c4-4630-ab43-e1b13cbe58e3
  - url: 'http://www.openwall.com/lists/oss-security/2025/04/24/4'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2025/04/24/5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2025/04/24/6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2025/04/25/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2025/04/25/2'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00227
epssPercentile: 0.11954
ingestedAt: '2026-07-29T08:45:05.555Z'
---

## Overview

There is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter. This requires an incorrectly formatted markdown file to be passed to QTextMarkdownImporter to trigger the overflow.

This issue affects Qt from 6.8.0 to 6.8.4. Versions up to 6.6.0 are known to be unaffected, and the fix is in 6.8.4 and later.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.