{"schema_version":"1.7.5","id":"CVE-2021-22945","published":"2021-09-23T13:15:08.690Z","modified":"2026-07-08T06:00:33.807698151Z","aliases":["CURL-CVE-2021-22945"],"related":["openSUSE-SU-2024:10582-1"],"details":"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":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"315ee3fe75dade912b48a21ceec9ccda0230d937"},{"last_affected":"bfbde883af33397943df68a3ae01847a634d33bf"}],"database_specific":{"cpe":"cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"7.73.0"},{"last_affected":"7.78.0"}],"source":"CPE_RANGE"}}],"versions":["curl-7_78_0","curl-7_77_0","curl-7_76_1","curl-7_76_0","curl-7_75_0","curl-7_74_0","curl-7_73_0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22945.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/mysql/mysql-server","events":[{"introduced":"0"},{"last_affected":"89713bf41c33528c3e7682d219dc838915f5af9a"},{"introduced":"270fd3411e3d671a73ed9725940a30080f59ce6d"},{"last_affected":"beb865a960b9a8a16cf999c323e46c5b0c67f21f"}],"database_specific":{"cpe":"cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"5.7.0"},{"last_affected":"5.7.35"},{"introduced":"8.0.0"},{"last_affected":"8.0.26"}],"source":"CPE_RANGE"}}],"versions":["mysql-cluster-8.0.26","mysql-8.0.26","mysql-5.7.35","mysql-5.7.32","mysql-5.7.31","mysql-5.1.4","mysql-4.0.4","mysql-4.0.2","mysql-3.23.36","mysql-3.23.33","mysql-3.23.32","mysql-3.23.31","mysql-3.23.30-gamma","mysql-3.23.28-gamma","mysql-3.23.22-beta"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22945.json"}}],"references":[{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2022/Mar/29"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202212-01"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20211029-0003/"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213183"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5197"},{"type":"FIX","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"},{"type":"FIX","url":"https://hackerone.com/reports/1269242"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"12.0.0"},{"fixed":"12.3"}],"source":"CPE_RANGE","vendor_product":"apple:macos"},{"cpes":["cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"1.0.1.1"}],"source":"CPE_RANGE","vendor_product":"siemens:sinec_ins"},{"cpes":["cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.2.0"},{"fixed":"8.2.12"},{"introduced":"9.0.0"},{"fixed":"9.0.6"}],"source":"CPE_RANGE","vendor_product":"splunk:universal_forwarder"},{"cpes":["cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"11.0"},{"last_affected":"11.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux"},{"cpes":["cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"33"},{"last_affected":"33"},{"introduced":"35"},{"last_affected":"35"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"},{"cpes":["cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"9.1.0"},{"last_affected":"9.1.0"}],"source":"CPE_STRING","vendor_product":"splunk:universal_forwarder"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}