CVE-2026-6653: CWE-416 Use after free in GNOME libxml2
Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.
AI Analysis
Technical Summary
CVE-2026-6653 is a use-after-free vulnerability in the xmlParseInternalSubset function of GNOME libxml2, specifically affecting version 2.9.11. The issue arises from improper handling of entity resolution in XML input, which can be exploited remotely to cause a denial-of-service condition. The vulnerability is classified under CWE-416 (Use After Free) and has a high CVSS 4.0 score of 7. The vendor has not yet provided an official fix or remediation level, and no known exploits are reported in the wild.
Potential Impact
A remote attacker can cause a denial-of-service by sending specially crafted XML data that triggers the use-after-free condition in libxml2 2.9.11. This can lead to application crashes or service interruptions where libxml2 is used for XML parsing. There is no indication of privilege escalation or code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying workarounds such as disabling or restricting processing of untrusted XML input if feasible. Monitor vendor channels for updates.
CVE-2026-6653: CWE-416 Use after free in GNOME libxml2
Description
Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.
CVSS v4.0
Score 7.0high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6653 is a use-after-free vulnerability in the xmlParseInternalSubset function of GNOME libxml2, specifically affecting version 2.9.11. The issue arises from improper handling of entity resolution in XML input, which can be exploited remotely to cause a denial-of-service condition. The vulnerability is classified under CWE-416 (Use After Free) and has a high CVSS 4.0 score of 7. The vendor has not yet provided an official fix or remediation level, and no known exploits are reported in the wild.
Potential Impact
A remote attacker can cause a denial-of-service by sending specially crafted XML data that triggers the use-after-free condition in libxml2 2.9.11. This can lead to application crashes or service interruptions where libxml2 is used for XML parsing. There is no indication of privilege escalation or code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying workarounds such as disabling or restricting processing of untrusted XML input if feasible. Monitor vendor channels for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-04-20T06:37:45.271Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a393e8aeed863c81ee5cd77
Added to database: 06/22/2026, 13:54:18 UTC
Last enriched: 06/22/2026, 14:09:32 UTC
Last updated: 06/23/2026, 02:46:04 UTC
Views: 28
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