Vulnerability in QTextMarkdownImporter (CVE-2025-3512)
Summary
Vulnerability in QTextMarkdownImporter (CVE-2025-3512). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
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.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2025-3512 has been found in QTextMarkdownImporter.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "QTextMarkdownImporter CVE-2025-3512" on the vendor's site.
CVE-2025-3512 (QTextMarkdownImporter) — CWE-122
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-122) exists in QTextMarkdownImporter.
Check the vendor advisory for the affected versions of QTextMarkdownImporter.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'QTextMarkdownImporter' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'QTextMarkdownImporter' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
QTextMarkdownImporterを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2025-3512 qt6-base Fixed in: 6.8.2+dfsg-6
- Ubuntu UBUNTU-CVE-2025-3512 qtbase-opensource-src-gles
References
- web codereview.qt-project.org
- web openwall.com
- web openwall.com
- web openwall.com
- web openwall.com
- web openwall.com