CVE-2021-22945
9.1
CRITICAL
CVSS 3.1
EPSS 0.35%
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*.
How to fix CVE-2021-22945
To remediate CVE-2021-22945, upgrade the affected package to a fixed version below.
- Alpine/curl—upgrade to 7.79.0-r0 or later
- —upgrade to 7.74.0-1.3+deb11u2 or later
Is CVE-2021-22945 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 7.79.0-r0
- from 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 |