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CVE-2021-22945

Published: 9/23/2021 Last updated: 6/9/2025 Reserved: 1/6/2021

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*.

CNA assigner: hackerone (36234546-b8fa-4601-9d6f-f4e334aa8ea1) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 9.1 Critical CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Opam packages affected (3)

conf-libcurl conf-mingw-w64-curl-i686 conf-mingw-w64-curl-x86_64

Products affected (1)

Product Vendor Version
https://github.com/curl/curl n/a n/a

References (20)