High severity7.8NVD Advisory· Published Jun 1, 2021· Updated Jun 17, 2026
CVE-2021-3516
CVE-2021-3516
Description
There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
47- libxml2/libxml2description
- Range: <2.9.11
- Range: <2.9.11
- osv-coords44 versionspkg:rpm/almalinux/libxml2-develpkg:rpm/opensuse/libxml2&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/libxml2&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-libxml2-python&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/ruby3.2-rubygem-nokogiri&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/rubygem-nokogiri&distro=openSUSE%20Tumbleweedpkg:rpm/suse/libxml2&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Micro%205.0pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/libxml2&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/libxml2&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/libxml2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/libxml2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/python-libxml2&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/python-libxml2&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/python-libxml2&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/python-libxml2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/python-libxml2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/python-libxml2-python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/python-libxml2-python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3pkg:rpm/suse/python-libxml2-python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%202%2015%20SP2pkg:rpm/suse/python-libxml2-python&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%202%2015%20SP3
< 2.9.7-9.el8_4.2+ 43 more
- (no CPE)range: < 2.9.7-9.el8_4.2
- (no CPE)range: < 2.9.7-lp152.10.9.1
- (no CPE)range: < 2.9.12-1.2
- (no CPE)range: < 2.9.7-lp152.10.9.1
- (no CPE)range: < 1.13.9-1.7
- (no CPE)range: < 1.13.3-1.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.7-3.31.1
- (no CPE)range: < 2.9.7-3.31.1
- (no CPE)range: < 2.9.7-3.31.1
- (no CPE)range: < 2.7.6-0.77.36.1
- (no CPE)range: < 2.7.6-0.77.36.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.40.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.40.1
- (no CPE)range: < 2.9.4-46.40.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.7.6-0.77.36.1
- (no CPE)range: < 2.7.6-0.77.36.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.40.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.40.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.4-46.43.1
- (no CPE)range: < 2.9.7-3.31.1
- (no CPE)range: < 2.9.7-3.31.1
- (no CPE)range: < 2.9.7-3.31.1
- (no CPE)range: < 2.9.7-3.31.1
Patches
Vulnerability mechanics
References
9- gitlab.gnome.org/GNOME/libxml2/-/commit/1358d157d0bd83be1dfe356a69213df9fac0b539nvdPatchThird Party Advisory
- www.oracle.com/security-alerts/cpujan2022.htmlnvdPatchThird Party Advisory
- gitlab.gnome.org/GNOME/libxml2/-/issues/230nvdExploitIssue TrackingThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/05/msg00008.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202107-05nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20210716-0005/nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/nvd
News mentions
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