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    CVE-2021-3517

    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:Apr 22, 2021
    Last Modified:Dec 2, 2025
    EPS:May 19, 2021
    EPSS Score:0.00084
    CVSS Score:8.6

    Affected Products

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

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    CVE-2026-49975 (CVSS 7.5) — Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of …
    CVE-2026-9256 (CVSS 9.2) — NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerabilit…
    CVE-2026-31431 (CVSS 7.8) — In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating …
    CVE-2026-34757 (CVSS 5.1) — LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network …
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    References

    https://bugzilla.redhat.com/show_bug.cgi?id=1954232
    https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
    https://security.gentoo.org/glsa/202107-05
    https://security.netapp.com/advisory/ntap-20210625-0002/
    https://security.netapp.com/advisory/ntap-20211022-0004/
    https://www.oracle.com/security-alerts/cpuapr2022.html
    https://www.oracle.com/security-alerts/cpujan2022.html
    https://www.oracle.com/security-alerts/cpujul2022.html
    https://www.oracle.com/security-alerts/cpuoct2021.html
    https://bugzilla.redhat.com/show_bug.cgi?id=1954232
    https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
    https://security.gentoo.org/glsa/202107-05
    https://security.netapp.com/advisory/ntap-20210625-0002/
    https://security.netapp.com/advisory/ntap-20211022-0004/
    https://www.oracle.com/security-alerts/cpuapr2022.html
    https://www.oracle.com/security-alerts/cpujan2022.html
    https://www.oracle.com/security-alerts/cpujul2022.html
    https://www.oracle.com/security-alerts/cpuoct2021.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High