Description
There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.
Published: 2021-05-19
Score: 8.6 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2653-1 libxml2 security update
EUVD EUVD EUVD-2022-4443 There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.
Github GHSA Github GHSA GHSA-jw9f-hh49-cvp9 Nokogiri contains libxml Out-of-bounds Write vulnerability
Ubuntu USN Ubuntu USN USN-4991-1 libxml2 vulnerabilities
History

Tue, 02 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Debian Debian Linux
Fedoraproject Fedora
Netapp Active Iq Unified Manager Clustered Data Ontap Clustered Data Ontap Antivirus Connector E-series Santricity Os Controller E-series Santricity Storage Manager E-series Santricity Web Services Hci H410c Hci H410c Firmware Hci Management Node Manageability Software Development Kit Oncommand Insight Oncommand Workflow Automation Ontap Select Deploy Administration Utility Santricity Unified Manager Snapdrive Snapmanager Solidfire
Oracle Communications Cloud Native Core Network Function Cloud Native Environment Enterprise Manager Base Platform Mysql Workbench Openjdk Peoplesoft Enterprise Peopletools Real User Experience Insight Zfs Storage Appliance Kit
Redhat Enterprise Linux Jboss Core Services Rhmt
Xmlsoft Libxml2
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-12-02T21:34:00.585Z

Reserved: 2021-04-27T00:00:00.000Z

Link: CVE-2021-3517

cve-icon Vulnrichment

Updated: 2024-08-03T16:53:17.731Z

cve-icon NVD

Status : Modified

Published: 2021-05-19T14:15:07.553

Modified: 2025-12-02T22:16:07.097

Link: CVE-2021-3517

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-04-22T00:00:00Z

Links: CVE-2021-3517 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses