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).
Published: 2022-01-01
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2904-1 expat security update
Debian DSA Debian DSA DSA-5073-1 expat security update
EUVD EUVD EUVD-2021-32666 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).
Ubuntu USN Ubuntu USN USN-5288-1 Expat vulnerabilities
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00374}

epss

{'score': 0.00379}


Mon, 05 May 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Subscriptions

Debian Debian Linux
Libexpat Project Libexpat
Netapp Active Iq Unified Manager Hci Baseboard Management Controller Oncommand Workflow Automation Solidfire \& Hci Management Node
Redhat Enterprise Linux Jboss Core Services
Siemens Sinema Remote Connect Server
Tenable Nessus
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-05-05T16:45:11.487Z

Reserved: 2022-01-01T00:00:00.000Z

Link: CVE-2021-45960

cve-icon Vulnrichment

Updated: 2024-08-04T04:54:31.123Z

cve-icon NVD

Status : Modified

Published: 2022-01-01T19:15:08.030

Modified: 2025-05-05T17:17:28.457

Link: CVE-2021-45960

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-01-17T00:00:00Z

Links: CVE-2021-45960 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses