VULNERABILITY INTELLIGENCE

CVE-2021-22945

CVSS score9.1 CRITICAL
EPSS probability6.68%
CISA KEVNot currently listed
Published2021-09-23
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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*.

Weakness classification

  • CWE-415: Double Free

Primary references