CVE-2025-3512: Qt

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Qt Qt: from 6.8.0, before 6.8.4 (fixed in 6.8.4)

Published 2025-04-11. Last modified 2026-07-29.