CVE-2021-22945
CRITICAL9.1EPSS 0.35%Published: 9/23/2021Modified: 4/28/2026
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*.
Affected packages (2)
- Alpine/curlfrom 0, < 7.79.0-r0
- Debian/curlfrom 0, < 7.74.0-1.3+deb11u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |