CVE-2021-22945
- State
- Published
- Severity
- 9.1 Critical
- Published
- Sep 23, 2021
- Updated
- Oct 14, 2026
- Reserved
- Jan 6, 2021
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*.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-415 Double Free (CWE-415)
Affected Products
| Product | Versions |
|---|---|
https://github.com/curl/curln/a |
|
References
- https://hackerone.com/reports/1269242
- FEDORA-2021-fc96a3a749vendor-advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.netapp.com/advisory/ntap-20211029-0003/
- FEDORA-2021-1d24845e93vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://support.apple.com/kb/HT213183
- 20220314 APPLE-SA-2022-03-14-4 macOS Monterey 12.3mailing-list
- DSA-5197vendor-advisory
- GLSA-202212-01vendor-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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