CVE-2021-3975

 

Published at: - 23-08-2022 10:15

Last modified: - 24-10-2022 03:08

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://access.redhat.com/security/cve/CVE-2021-3975
• https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7
• https://ubuntu.com/security/CVE-2021-3975
• https://bugzilla.redhat.com/show_bug.cgi?id=2024326

 

Keywords

NVD

 

CVE-2021-3975

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures