Application crash via attribute-metadata use-after-free
Published Jul 10, 2025 · Updated Aug 25, 2026
Use-after-free in XMLSoft libxml2 before 2.15.2 allows attackers to crash applications or corrupt heap memory via crafted XSLT. The xsltSetSourceNodeFlags() function changes xmlAttrPtr atype flags on result tree fragments, preventing ID-reference cleanup before later routines reuse freed memory. Exploitation requires an application to process attacker-controlled XSLT; a crash is established, while code execution depends on favorable heap reuse.
Summary
What happened
Use-after-free in XMLSoft libxml2 before 2.15.2 allows attackers to crash applications or corrupt heap memory via crafted XSLT. The xsltSetSourceNodeFlags() function changes xmlAttrPtr atype flags on result tree fragments, preventing ID-reference cleanup before later routines reuse freed memory. Exploitation requires an application to process attacker-controlled XSLT; a crash is established, while code execution depends on favorable heap reuse.
The record
- CVE
- CVE-2025-7425
- Published
- Jul 10, 2025
- Updated
- Aug 25, 2026
- Vendor
- XMLSoft
- Product
- libxml2
- Classifications
- CWE-416
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 10, 2025CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <2.15.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Technologies
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Your stack
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