CVE-2021-3975

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.

Affected Platforms

Weakness Type

CWE-416, CWE-416

References

• https://access.redhat.com/security/cve/CVE-2021-3975
• https://bugzilla.redhat.com/show_bug.cgi?id=2024326
• https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18e…
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
• https://security.netapp.com/advisory/ntap-20221201-0002/
• https://ubuntu.com/security/CVE-2021-3975