High severity8.8NVD Advisory· Published Jan 1, 2022· Updated Jun 17, 2026
CVE-2021-45960
CVE-2021-45960
Description
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
56cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*range: <2.4.3
- (no CPE)range: <2.4.3
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*Range: <3.1
- Expat/libexpatdescription
- Range: <2.4.3
- osv-coords42 versionspkg:rpm/almalinux/expatpkg:rpm/almalinux/expat-develpkg:rpm/opensuse/expat&distro=openSUSE%20Leap%2015.3pkg:rpm/opensuse/expat&distro=openSUSE%20Tumbleweedpkg:rpm/suse/expat&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/expat&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/expat&distro=SUSE%20Enterprise%20Storage%207pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Micro%205.0pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCLpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/expat&distro=SUSE%20Manager%20Proxy%204.1pkg:rpm/suse/expat&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1pkg:rpm/suse/expat&distro=SUSE%20Manager%20Server%204.1pkg:rpm/suse/expat&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/expat&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/expat&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/expat&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 2.2.5-8.el8_6.2+ 41 more
- (no CPE)range: < 2.2.5-8.el8_6.2
- (no CPE)range: < 2.2.5-8.el8_6.2
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.4.3-1.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.0.1-88.42.12.1
- (no CPE)range: < 2.0.1-88.42.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.2.5-3.9.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
- (no CPE)range: < 2.1.0-21.12.1
Patches
Vulnerability mechanics
References
9- cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfnvdPatchThird Party Advisory
- github.com/libexpat/libexpat/pull/534nvdPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2022/01/17/3nvdExploitMailing ListThird Party Advisory
- github.com/libexpat/libexpat/issues/531nvdExploitIssue TrackingPatchThird Party Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredThird Party Advisory
- security.gentoo.org/glsa/202209-24nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20220121-0004/nvdThird Party Advisory
- www.debian.org/security/2022/dsa-5073nvdIssue TrackingThird Party Advisory
- www.tenable.com/security/tns-2022-05nvdThird Party Advisory
News mentions
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