CVE-2021-3537

MEDIUM

libxml2 < 2.9.11 - NULL Pointer Dereference via XML Mixed Content Parsing

Title source: llm
STIX 2.1

Description

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.

References (9)

Core 9
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1956522
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202107-05
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210625-0002/
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuoct2021.html
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuapr2022.html

Scores

CVSS v3 5.9
EPSS 0.0011
EPSS Percentile 29.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (25)
debian/debian_linux 9.0
fedoraproject/fedora 33
fedoraproject/fedora 34
netapp/active_iq_unified_manager
netapp/clustered_data_ontap
netapp/clustered_data_ontap_antivirus_connector
netapp/hci_h410c_firmware
netapp/manageability_software_development_kit
netapp/ontap_select_deploy_administration_utility
netapp/snapdrive
... and 15 more
Published May 14, 2021
Tracked Since Feb 18, 2026