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CVE-2025-5991
Published: Jun 11, 2025
Modified: Jun 11, 2025
PUBLISHED
Description
There is a "Use After Free" vulnerability in Qt's QHttp2ProtocolHandler in the QtNetwork module. This only affects HTTP/2 handling, HTTP handling is not affected by this at all. This happens due to a race condition between how QHttp2Stream uploads the body of a POST request and the simultaneous handling of HTTP error responses. This issue only affects Qt 6.9.0 and has been fixed for Qt 6.9.1.
| Vendor | Product | Versions |
|---|---|---|
The Qt Company | Qt | unaffected 0 - < 6.9.0affected 6.9.0unaffected 6.9.1 |
Weaknesses (CWE)
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