6.5

CVE-2021-3975

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.

Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Redhat ≫ Libvirt Version < 7.1.0
Canonical ≫ Ubuntu Linux Version21.10
Fedoraproject ≫ Fedora Version35
Redhat ≫ Enterprise Linux Version8.0
Redhat ≫ Enterprise Linux Eus Version8.6
Debian ≫ Debian Linux Version10.0
Debian ≫ Debian Linux Version11.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.489
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://access.redhat.com/security/cve/CVE-2021-3975
Third Party Advisory
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2024326
Patch
Third Party Advisory
Issue Tracking
https://ubuntu.com/security/CVE-2021-3975
Patch
Third Party Advisory