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.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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'}


Projects

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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