CVE-2021-3975
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Redhat Libvirt
PublishedAug 23, 2022
First seenAug 23, 2022
Weakness typeCWE-416Use after free
How to fix
Update
- redhat libvirt7.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat libvirt | v < 7.1.0 | 7.1.0 |
| canonical ubuntu_linux | 21.10 | — |
| fedoraproject fedora | 35 | — |
| 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 | — |
| redhat enterprise_linux_for_power_little_endian | 8.0 | — |
| redhat enterprise_linux_for_power_little_endian_eus | 8.6 | — |
| redhat enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.6 | — |
| redhat enterprise_linux_server_tus | 8.6 | — |
| redhat codeready_linux_builder | No range specified | — |
| debian debian_linux | 10.0, 11.0 | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
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