UBUNTU-CVE-2026-6732

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Source
https://ubuntu.com/security/CVE-2026-6732
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6732.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-6732
Upstream
Downstream
Related
Published
2026-04-23T23:16:00Z
Modified
2026-06-23T00:30:10.302369438Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable.

References

Affected packages

Ubuntu:25.10 / libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.14.5+dfsg-0.2ubuntu0.2

Affected versions

2.*
2.12.7+dfsg+really2.9.14-0.4
2.12.7+dfsg+really2.9.14-0.4ubuntu0.1
2.12.7+dfsg+really2.9.14-1
2.14.3+dfsg-0exp1
2.14.3+dfsg-0exp2
2.14.3+dfsg-0exp3
2.14.4+dfsg-0exp1
2.14.5+dfsg-0exp1
2.14.5+dfsg-0exp2
2.14.5+dfsg-0.1
2.14.5+dfsg-0.2
2.14.5+dfsg-0.2ubuntu0.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.14.5+dfsg-0.2ubuntu0.2",
            "binary_name": "libxml2-16"
        },
        {
            "binary_version": "2.14.5+dfsg-0.2ubuntu0.2",
            "binary_name": "libxml2-utils"
        },
        {
            "binary_version": "2.14.5+dfsg-0.2ubuntu0.2",
            "binary_name": "python3-libxml2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6732.json"

Ubuntu:26.04:LTS / libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.15.2+dfsg-0.1ubuntu0.1

Affected versions

2.*
2.14.5+dfsg-0.2
2.14.5+dfsg-0.2build1
2.15.1+dfsg-0.3
2.15.1+dfsg-0.4
2.15.1+dfsg-1
2.15.1+dfsg-2
2.15.1+dfsg-2ubuntu1
2.15.1+dfsg-2ubuntu2
2.15.2+dfsg-0.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.15.2+dfsg-0.1ubuntu0.1",
            "binary_name": "libxml2-16"
        },
        {
            "binary_version": "2.15.2+dfsg-0.1ubuntu0.1",
            "binary_name": "libxml2-source"
        },
        {
            "binary_version": "2.15.2+dfsg-0.1ubuntu0.1",
            "binary_name": "libxml2-utils"
        },
        {
            "binary_version": "2.15.2+dfsg-0.1ubuntu0.1",
            "binary_name": "python3-libxml2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6732.json"