CVE-2021-3517

8.6 HIGH
Published: May 19, 2021 Modified: December 02, 2025
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1954232
Source: secalert@redhat.com
Issue Tracking Patch Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Source: secalert@redhat.com
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Source: secalert@redhat.com
https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
Source: secalert@redhat.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
Source: secalert@redhat.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
Source: secalert@redhat.com
https://security.gentoo.org/glsa/202107-05
Source: secalert@redhat.com
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210625-0002/
Source: secalert@redhat.com
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211022-0004/
Source: secalert@redhat.com
Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
Source: secalert@redhat.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: secalert@redhat.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
Source: secalert@redhat.com
Not Applicable
https://www.oracle.com/security-alerts/cpuoct2021.html
Source: secalert@redhat.com
Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1954232
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Patch Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/202107-05
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210625-0002/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211022-0004/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Not Applicable
https://www.oracle.com/security-alerts/cpuoct2021.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory

26 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.6 / 10.0
EPSS (Exploit Probability)
0.1%
25th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-787 CWE-787 CWE-125

Affected Vendors

redhat xmlsoft fedoraproject netapp oracle debian

Related CVEs

CVE-2025-52691 10.0
CVE-2025-15168 7.3
CVE-2025-15167 7.3
CVE-2025-15166 7.3
CVE-2025-15165 7.3