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CVE-2021-22945

Published: Sep 23, 2021Updated: Jun 9, 2025 Sources: CVE List NVD BDU csafCWE-415
9.1CRITICAL
NVD MITRE
EPSS Score
6.7%
Top 6.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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*.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-415

Affected Products

netapp
commercial·US
cloud backup
Hardware Firmware
clustered data ontap
Hardware Firmware
h300s firmware
Hardware Firmware
h500s firmware
Hardware Firmware
h700s firmware
Hardware Firmware
h300e firmware
Hardware Firmware
h500e firmware
Hardware Firmware
h700e firmware
Hardware Firmware
haxx
oss-project·SEaka haxx.se
libcurl
OSS Libraries
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
oracle
commercial·USaka oracle corp.
mysql serverOn-premDatabase
Databases / relational
apple
commercial·USaka apple computer, apple inc.
macosOn-premOS
Operating Systems / unix-bsd
siemens
commercial·DEaka siemens ag
sinec ins
ICS / OT / IoT
and 9 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-22945?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://hackerone.com/reports/1269242
hackerone.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
lists.fedoraproject.org
https://www.oracle.com/security-alerts/cpuoct2021.html
oracle.com
and 22 more references View all →

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