CVE-2021-22945
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 t…
Published Sep 23, 2021 · updated Oct 14, 2026 · haxx libcurl
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*.
Timeline
Detection, updates, and resolution for this record.
Sep 23, 2021 · NIST NVD
Detected
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*.
Oct 14, 2026 · NIST NVD
Updated
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*.
Affected
- cpe fedoraproject/fedora33
- cpe fedoraproject/fedora35
- cpe haxx/libcurlversion unspecified
- cpe netapp/cloud backupversion unspecified
- cpe netapp/clustered data ontapversion unspecified
- cpe netapp/h300e firmwareversion unspecified
- cpe netapp/h300s firmwareversion unspecified
- cpe netapp/h500e firmwareversion unspecified
- cpe netapp/h500s firmwareversion unspecified
- cpe netapp/h700s firmwareversion unspecified
- cpe oracle/mysql serverversion unspecified
Sources
- CVE.orgCVE-2021-22945
Official CVE identifier
cve.org - NIST NVDCVE-2021-22945
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*.
nvd.nist.gov