SecuriTricks - CVE-2025-5991

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.

Product(s) Impacted

Vendor	Product	Versions
Qt	Qt Network	6.9.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-416

Use After Free

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	qt	qt_network	6.9.0	/	/	/	/	/	/	/

References

https://codereview.qt-project.org/c/qt/qtbase/+/643777

CVSS Score

2.1 / 10

CVSS Data - 4.0

Attack Vector: LOCAL
Attack Complexity: HIGH
Attack Requirements: NONE
Privileges Required: NONE
User Interaction: NONE
Scope:
Confidentiality Impact: LOW
Integrity Impact: LOW
Availability Impact: LOW
Exploit Maturity: NOT_DEFINED

CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

View Vector String

Timeline

Published: June 11, 2025, 8:15 a.m.
Last Modified: June 12, 2025, 4:06 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

a59d8014-47c4-4630-ab43-e1b13cbe58e3

CVE-2025-5991