CVE-2021-3517
There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11.
Published May 19, 2021 · updated Oct 14, 2026 · xmlsoft libxml2
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.
Timeline
Detection, updates, and resolution for this record.
May 19, 2021 · NIST NVD
Detected
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 a
Oct 14, 2026 · NIST NVD
Updated
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 a
Affected
- cpe debian/debian linux9.0
- cpe fedoraproject/fedora33
- cpe fedoraproject/fedora34
- cpe netapp/active iq unified managerversion unspecified
- cpe netapp/hci h410c firmwareversion unspecified
- cpe oracle/communications cloud native core network function cloud native environment1.10.0
- cpe redhat/enterprise linux8.0
- cpe redhat/jboss core servicesversion unspecified
- cpe xmlsoft/libxml2version unspecified
Sources
- CVE.orgCVE-2021-3517
Official CVE identifier
cve.org - NIST NVDCVE-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
nvd.nist.gov