UBUNTU-CVE-2026-6653
A use-after-free vulnerability exists in libxml2's xmlParseInternalSubset function in GNOME libxml2 versions from 2.9.11 to 2.11.0. This flaw allows a remote attacker to cause a denial-of-service by supplying maliciously crafted XML input that improperly handles entity resolution.
AI Analysis
Technical Summary
The vulnerability is a use-after-free in the xmlParseInternalSubset function of libxml2, affecting versions from 2.9.11 up to 2.11.0. An attacker can exploit this by sending specially crafted XML data that triggers improper entity resolution, leading to a denial-of-service condition. The issue is present in Ubuntu LTS releases 22.04 and 24.04 as indicated by the affected package versions. There are no known exploits in the wild and no vendor advisory or patch links provided in the input data.
Potential Impact
Successful exploitation results in a denial-of-service condition due to use-after-free memory corruption. This can cause the affected application or service using libxml2 to crash or become unresponsive. 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. No official fix or patch links are provided in the input data. Users should monitor Ubuntu security advisories for updates addressing this vulnerability and apply patches once available.
UBUNTU-CVE-2026-6653
Description
A use-after-free vulnerability exists in libxml2's xmlParseInternalSubset function in GNOME libxml2 versions from 2.9.11 to 2.11.0. This flaw allows a remote attacker to cause a denial-of-service by supplying maliciously crafted XML input that improperly handles entity resolution.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.12?arch=source&distro=jammypkg:deb/ubuntu/[email protected]+dfsg-1.3ubuntu3.8?arch=source&distro=nobleRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability is a use-after-free in the xmlParseInternalSubset function of libxml2, affecting versions from 2.9.11 up to 2.11.0. An attacker can exploit this by sending specially crafted XML data that triggers improper entity resolution, leading to a denial-of-service condition. The issue is present in Ubuntu LTS releases 22.04 and 24.04 as indicated by the affected package versions. There are no known exploits in the wild and no vendor advisory or patch links provided in the input data.
Potential Impact
Successful exploitation results in a denial-of-service condition due to use-after-free memory corruption. This can cause the affected application or service using libxml2 to crash or become unresponsive. 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. No official fix or patch links are provided in the input data. Users should monitor Ubuntu security advisories for updates addressing this vulnerability and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-6653
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:22.04:LTS","Ubuntu:24.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b4fe68715ace43db23fa
Added to database: 07/16/2026, 10:39:58 UTC
Last enriched: 07/16/2026, 14:05:36 UTC
Last updated: 08/27/2026, 10:52:10 UTC
Views: 42
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