CVE-2025-5991

qt: Use after free in Qt

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Severity

Moderate

Red Hat Product Security

5.6

CVSS 3.1

Review impact separately from score.

Published · June 11, 2025

Updated · June 30, 2026

Description

A use-after-free vulnerability has been discovered in Qt's QHttp2ProtocolHandler function. This vulnerability only affects HTTP/2 handling and is the result of a race condition between HTTP body and error response handling.

Statement

The specific versions of Qt affected are not shipped in RedHat products.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

CWE-416 · Use After Free