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CVE-2021-3975

Published: Aug 23, 2022Updated: Nov 21, 2024 Sources: CVE List NVDCWE-416
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
1.2%
Top 36.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

CVSS Vector Breakdown

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

Weaknesses

CWE-416

Affected Products

libvirtn/a
libvirtredhat
On-premLibrary
Operating Systems / linux-distro
ubuntu linuxcanonical
On-premOS
Operating Systems / linux-distro
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
enterprise linuxredhat
On-premOS
Operating Systems / linux-distro
redhatcommercialUSOperating Systemsaka red hat
canonicalcommercialGBOperating Systemsaka canonical ltd.
fedoraprojectoss-projectUSOperating Systemsaka fedora project
and 10 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://bugzilla.redhat.com/show_bug.cgi?id=2024326
bugzilla.redhat.com
https://access.redhat.com/security/cve/CVE-2021-3975
access.redhat.com
https://ubuntu.com/security/CVE-2021-3975
ubuntu.com
and 3 more references View all →

Timeline

Published
Aug 23, 2022
Last Updated
Nov 21, 2024

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