CVE-2025-5991
CVE-2025-5991 · Use after free in QHttp2ProtocolHandler
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 2.1 · Low · EPSS 0.1% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
qt
- Versions
- ≥ 0, < 6.9.0: Not affected (python)
- 6.9.0: Affected
- 6.9.1: Not affected
Update to 6.9.1
qtbase-opensource-src-gles Ubuntu:16.04:LTS
- Versions
- 5.4.2+dfsg-2ubuntu9
- 5.5.1+dfsg-6ubuntu1
- 5.5.1+dfsg-10ubuntu1
- 5.5.1+dfsg-13ubuntu1
- 5.5.1+dfsg-13ubuntu2
- 5.5.1+dfsg-13ubuntu3
- 5.5.1+dfsg-14ubuntu1
- 5.5.1+dfsg-14ubuntu2
- 5.5.1+dfsg-14ubuntu3
- 5.5.1+dfsg-15ubuntu1
- 5.5.1+dfsg-16ubuntu1
- 5.5.1+dfsg-16ubuntu4
- 5.5.1+dfsg-16ubuntu5
- 5.5.1+dfsg-16ubuntu6
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qtbase-opensource-src-gles Ubuntu:20.04:LTS
- Versions
- 5.12.4+dfsg-1build1
- 5.12.5+dfsg-1
- 5.12.5+dfsg-2
- 5.12.8+dfsg-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qt6-base Ubuntu:22.04:LTS
- Versions
- 6.2.2+dfsg-5ubuntu1
- 6.2.2+dfsg-6ubuntu1
- 6.2.2+dfsg-6ubuntu2
- 6.2.4+dfsg-1ubuntu1
- 6.2.4+dfsg-2ubuntu1
- 6.2.4+dfsg-2ubuntu1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qtbase-opensource-src-gles Ubuntu:22.04:LTS
- Versions
- 5.15.2+dfsg-4
- 5.15.2+dfsg-5
- 5.15.3+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qt6-base Ubuntu:24.04:LTS
- Versions
- 6.4.2+dfsg-18
- 6.4.2+dfsg-19
- 6.4.2+dfsg-19build1
- 6.4.2+dfsg-20
- 6.4.2+dfsg-21
- 6.4.2+dfsg-21.1build4
- 6.4.2+dfsg-21.1build5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qtbase-opensource-src-gles Ubuntu:24.04:LTS
- Versions
- 5.15.10+dfsg-2
- 5.15.10+dfsg-3
- 5.15.12+dfsg-1
- 5.15.12+dfsg-1ubuntu1
- 5.15.12+dfsg-1ubuntu2
- 5.15.13+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qt6-base Ubuntu:25.10
- Versions
- 6.8.3+dfsg-0ubuntu2
- 6.8.3+dfsg-0ubuntu3
- 6.9.2+dfsg-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qtbase-opensource-src-gles Ubuntu:25.10
- Versions
- 5.15.15+dfsg-2
- 5.15.17+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qt6-base Ubuntu:26.10
- Versions
- 6.10.2+dfsg-7
- 6.10.2+dfsg-14ubuntu2
- 6.10.2+dfsg-15
- 6.10.2+dfsg-16
- 6.11.2+dfsg-4ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qtbase-opensource-src-gles Ubuntu:26.10
- Versions
- 5.15.18+dfsg-1
- 5.15.19+dfsg-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qt6-base Ubuntu:26.04:LTS
- Versions
- 6.9.2+dfsg-1ubuntu1
- 6.9.2+dfsg-2
- 6.9.2+dfsg-3ubuntu1
- 6.9.2+dfsg-3ubuntu2
- 6.9.2+dfsg-4
- 6.10.2+dfsg-3
- 6.10.2+dfsg-6
- 6.10.2+dfsg-7
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
qtbase-opensource-src-gles Ubuntu:26.04:LTS
- Versions
- 5.15.17+dfsg-1
- 5.15.17+dfsg-2
- 5.15.18+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published