CVE-2025-6338

creationtimestamp| type| source ---|---|--- 2025-10-16 10:33:44+00:00| seen| https://bsky.app/profile/offseq.bsky.social/post/3m3cknev7ec2o...

CVE-2025-6338 Possible denial of service with multiple incoming connections to a Schannel based server with a TLS backend

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...

Security advisory: Recently reported incomplete cleanup issue in Qt's Schannel handling can impact Qt

There is a "Incomplete Cleanup" problem in Qt’s Schannel handling when it is used to provide a server handling incoming TLS connections. This has been assigned the CVE id CVE-2025-6338. Affected versions: This issue affects only the Schannel functionality on Windows if it is turned on in Qt 5.15...