Description
When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.
Published: 2021-09-23
Score: 9.1 Critical
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 DSA Debian DSA DSA-5197-1 curl security update
EUVD EUVD EUVD-2021-10073 When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.
Ubuntu USN Ubuntu USN USN-5079-1 curl vulnerabilities
History

Mon, 09 Jun 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Apple Macos
Debian Debian Linux
Fedoraproject Fedora
Haxx Libcurl
Netapp Cloud Backup Clustered Data Ontap H300e H300e Firmware H300s H300s Firmware H410s H410s Firmware H500e H500e Firmware H500s H500s Firmware H700e H700e Firmware H700s H700s Firmware Solidfire Baseboard Management Controller Solidfire Baseboard Management Controller Firmware
Oracle Mysql Server
Siemens Sinec Ins
Splunk Universal Forwarder
cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2025-06-09T14:47:23.444Z

Reserved: 2021-01-06T00:00:00.000Z

Link: CVE-2021-22945

cve-icon Vulnrichment

Updated: 2024-08-03T18:58:26.137Z

cve-icon NVD

Status : Modified

Published: 2021-09-23T13:15:08.690

Modified: 2025-06-09T15:15:25.540

Link: CVE-2021-22945

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-09-15T00:00:00Z

Links: CVE-2021-22945 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses