CVE-2025-5991 | Qt 6.9.0 QtNetwork Module QHttp2ProtocolHandler use after free

June 11, 2025 Yanac

A vulnerability, which was classified as critical, was found in Qt 6.9.0. This affects the function QHttp2ProtocolHandler of the component QtNetwork Module. The manipulation leads to use after free.

This vulnerability is uniquely identified as CVE-2025-5991. The attack needs to be approached locally. There is no exploit available.

It is recommended to upgrade the affected component.VulDB Recent EntriesRead More