VulnerabilityModified
CVE-2021-3975
A use-after-free flaw was found in libvirt.
MEDIUM 6.5EPSS 1.54%
Does this matter?
Lower severity and a low EPSS score (1.54%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.54% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- redhat/libvirt · canonical/ubuntu linux · fedoraproject/fedora · redhat/enterprise linux · redhat/enterprise linux eus · redhat/enterprise linux for ibm z systems · redhat/enterprise linux for ibm z systems eus · redhat/enterprise linux for power little endian · redhat/enterprise linux for power little endian eus · redhat/enterprise linux server for power little endian update services for sap solutions · redhat/enterprise linux server tus · redhat/codeready linux builder · debian/debian linux · netapp/ontap select deploy administration utility
- Source
- secalert@redhat.com
References
- https://access.redhat.com/security/cve/CVE-2021-3975Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024326Issue Tracking, Patch, Third Party Advisory
- https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
- https://security.netapp.com/advisory/ntap-20221201-0002/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3975Patch, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-3975Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2024326Issue Tracking, Patch, Third Party Advisory
- https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
- https://security.netapp.com/advisory/ntap-20221201-0002/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3975Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.