Main Vulnerability Database SB2025063097

SB2025063097 - Incomplete cleanup in Trolltech Qt

Published: June 30, 2025

Security Bulletin ID SB2025063097

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Resource management error (CVE-ID: CVE-2025-6338)

CWE-ID: CWE-399 - Resource Management Errors

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application during Schannel handling. For every connection made a 4KB file is created that is not cleaned up by the application or Qt. A remote attacker initiate multiple TLS connections with the server and perform a denial of service (DoS) attack by consuming all disk space.

Remediation

Install update from vendor's website.

References

https://www.qt.io/blog/security-advisory-recently-reported-incomplete-cleanup-issue-in-qts-schannel-handling-can-impact-qt