CVE-2025-6338

CriticalCVSS 9.2

Published: 16/10/2025(UTC)Updated: 29/07/2026(UTC)Translated: 29/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.43%

35th percentile - higher than 35% of all known CVEs

Summary

Incomplete cleanup in Qt Network's Schannel support on Windows can lead to a Denial of Service over time. Affects Qt from 5.15.0 through 6.8.3 and from 6.9.0 before 6.9.2.

Risk Assessment

Prolonged exploitation may exhaust resources and cause network service unavailability.

Recommendation

Upgrade Qt to version 6.9.2 or later; apply a patch for older branches.

Original NVD description (English source)

There is an incomplete cleanup vulnerability in Qt Network's Schannel support on Windows which can lead to a Denial of Service over a long period. This issue affects Qt from 5.15.0 through 6.8.3, from 6.9.0 before 6.9.2.