CVE-2021-22945Critical· 9.1▾ MidnightWhen 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*.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 50.1 · likelihood 1.3 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
6.7%
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.
libcurl >= 7.73.0, <= 7.78.0fedora = 33fedora = 35cloud_backupclustered_data_ontapmysql_server >= 5.7.0, <= 5.7.35mysql_server >= 8.0.0, <= 8.0.26h300s_firmwareh500s_firmwareh700s_firmwareh300e_firmwareh500e_firmwareh700e_firmwareh410s_firmwaresolidfire_baseboard_management_controller_firmwaremacos >= 12.0.0, < 12.3sinec_ins < 1.0.1.1debian_linux = 11.0universal_forwarder >= 8.2.0, < 8.2.12universal_forwarder >= 9.0.0, < 9.0.6universal_forwarder = 9.1.0Upgrade past the affected range:
macos 12.3sinec_ins 1.0.1.1universal_forwarder 9.0.6Connected by shared product, vendor, weakness, or advisory.
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