CVE-2024-39936: qt — Fix

Description

An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, and 6.6.x through 6.7.x before 6.7.3. Code to make security-relevant decisions about an established connection may execute too early, because the encrypted() signal has not yet been emitted and processed..

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CVSS v3.1 Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Weakness Type (CWE)

CWE-367 CWE-367

Affected Products

Vendor	Product	Versions
qt	qt	< 5.15.18
qt	qt	6.0.0 — 6.2.13
qt	qt	6.3.0 — 6.5.7
qt	qt	6.6.0 — 6.7.3

References

Advisories & Patches

https://codereview.qt-project.org/c/qt/qtbase/+/571601 https://codereview.qt-project.org/c/qt/qtbase/+/571601

Other References

https://lists.debian.org/debian-lts-announce/2025/11/msg00031.html

Frequently Asked Questions

What is CVE-2024-39936? +

An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, and 6.6.x through 6.7.x before 6.7.3. Code to make security-relevant decisions about an established connection may execute too early, because the encrypted() signal has not yet been emitted and processed.. It has a CVSS v3.1 base score of 8.6 (HIGH).

How severe is CVE-2024-39936? +

CVE-2024-39936 has a CVSS v3.1 score of 8.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-39936? +

CVE-2024-39936 affects products from qt, specifically: qt. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-39936? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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