Service interruption via quadratic QDom XML serialization
Published Mar 21, 2025 · Updated Mar 21, 2025
Inefficient XML serialization in The Qt Company Qt Framework before 6.8.0 allows attackers to interrupt service via long QDom text segments. QDomNode::save() reaches encodeText, which repeatedly copies and replaces XML string sections inline while relocating later data, producing quadratic work. Exploitation requires an application to serialize attacker-controlled long text or attributes with QDom at a rate and size sufficient to exhaust processing capacity.
Summary
What happened
Inefficient XML serialization in The Qt Company Qt Framework before 6.8.0 allows attackers to interrupt service via long QDom text segments. QDomNode::save() reaches encodeText, which repeatedly copies and replaces XML string sections inline while relocating later data, producing quadratic work. Exploitation requires an application to serialize attacker-controlled long text or attributes with QDom at a rate and size sufficient to exhaust processing capacity.
The record
- CVE
- CVE-2025-30348
- Published
- Mar 21, 2025
- Updated
- Mar 21, 2025
- Vendor
- The Qt Company
- Product
- Qt Framework
- Classifications
- CWE-407, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 21, 2025CVE publishedPublication date reported by the CVE source.
- Mar 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.15.19
- Affected versionversion=6.0.0 <6.5.9
- Affected versionversion=6.6.0 <6.8.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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