CVE-2021-3537
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference.
Published May 14, 2021 · updated Oct 14, 2026 · xmlsoft libxml2
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.
Timeline
Detection, updates, and resolution for this record.
May 14, 2021 · NIST NVD
Detected
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.
Oct 14, 2026 · NIST NVD
Updated
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.
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 linux6.0
- cpe redhat/enterprise linux7.0
- cpe redhat/enterprise linux8.0
- cpe redhat/jboss core servicesversion unspecified
- cpe xmlsoft/libxml2version unspecified
Sources
- CVE.orgCVE-2021-3537
Official CVE identifier
cve.org - NIST NVDCVE-2021-3537
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the applicat
nvd.nist.gov