CVE-2025-3512: medium-severity vulnerability in Qt
Buffer overflow in QTextMarkdownImporter
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.8epss 0.2%
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Clear
Affected products
Qt · QtRelated CVEs — Qt
In the same product, most dangerous first.
CVE-2026-15037LOWXML injection vulnerability in QDom comment, CDATA and processing-instruction serializationEPSS 0.4%CVE-2025-6338CRITICALPossible denial of service with multiple incoming connections to a Schannel based server with a TLS backendEPSS 0.4%CVE-2025-5455HIGHPossible denial of service when passing malformed data in a URL to qDecodeDataUrlEPSS 0.4%CVE-2025-30348MEDIUMCVE-2025-30348EPSS 0.4%CVE-2025-12385HIGHImproper validation of <img> tag size in Text component parserEPSS 0.3%CVE-2025-5992LOWPassing values outside of expected range to QColorTransferGenericFunction can cause a denial of serviceEPSS 0.3%
References
https://codereview.qt-project.org/c/qt/qtbase/+/635546http://www.openwall.com/lists/oss-security/2025/04/24/4http://www.openwall.com/lists/oss-security/2025/04/24/5http://www.openwall.com/lists/oss-security/2025/04/24/6http://www.openwall.com/lists/oss-security/2025/04/25/1http://www.openwall.com/lists/oss-security/2025/04/25/2