CVE-2021-3975
MEDIUMlibvirt < 7.1.0 - Use-After-Free in qemuMonitorUnregister
Title source: llmDescription
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.
References (6)
Core 6
Core References
Mailing List mailing-list
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
Issue Tracking, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3975
Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2024326
Patch, Third Party Advisory
https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221201-0002/
Patch, Third Party Advisory
https://ubuntu.com/security/CVE-2021-3975
Scores
CVSS v3
6.5
EPSS
0.0054
EPSS Percentile
67.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-416
Status
published
Products (15)
canonical/ubuntu_linux
21.10
debian/debian_linux
10.0
debian/debian_linux
11.0
fedoraproject/fedora
35
netapp/ontap_select_deploy_administration_utility
redhat/codeready_linux_builder
redhat/enterprise_linux
8.0
redhat/enterprise_linux_eus
8.6
redhat/enterprise_linux_for_ibm_z_systems
8.0
redhat/enterprise_linux_for_ibm_z_systems_eus
8.6
... and 5 more
Published
Aug 23, 2022
Tracked Since
Feb 18, 2026