Critical severity9.1NVD Advisory· Published Sep 23, 2021· Updated Jun 17, 2026
CVE-2021-22945
CVE-2021-22945
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*.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
10- cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfnvdPatchThird Party Advisory
- www.oracle.com/security-alerts/cpuoct2021.htmlnvdPatchThird Party Advisory
- hackerone.com/reports/1269242nvdExploitPatchThird Party Advisory
- seclists.org/fulldisclosure/2022/Mar/29nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/nvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202212-01nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20211029-0003/nvdThird Party Advisory
- support.apple.com/kb/HT213183nvdThird Party Advisory
- www.debian.org/security/2022/dsa-5197nvdThird Party Advisory
News mentions
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