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*.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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'}


Projects

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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