Affected: AlmaLinux:10: libvirt, AlmaLinux:10: libvirt-client, AlmaLinux:10: libvirt-client-qemu, AlmaLinux:10: libvirt-daemon, AlmaLinux:10: libvirt-daemon-common, AlmaLinux:10: libvirt-daemon-config-network, AlmaLinux:10: libvirt-daemon-config-nwfilter, AlmaLinux:10: libvirt-daemon-driver-interface, AlmaLinux:10: libvirt-daemon-driver-network, AlmaLinux:10: libvirt-daemon-driver-nodedev and 22 more

Kernel-based Virtual Machine (KVM) offers a full virtualization solution forLinux on numerous hardware platforms. The virt:rhel module contains packageswhich provide user-space components used to run virtual machines using KVM.The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

* libvirt: Denial of service in XML parsing (CVE-2025-12748)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Affected: Alpaquita:23: libvirt, Alpaquita:25: libvirt, Alpaquita:stream: libvirt

A flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.

A flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.

Affected: openEuler:24.03-LTS: libvirt

Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). The main package includes the libvirtd server exporting the virtualization support. Security Fix(es):

A flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.(CVE-2025-12748)

libvirt-11.9.0-2.1 on GA media

libvirt: Denial of service in XML parsing

Affected: Rocky Linux:10: libvirt

Kernel-based Virtual Machine (KVM) offers a full virtualization solution forLinux on numerous hardware platforms. The virt:rhel module contains packageswhich provide user-space components used to run virtual machines using KVM.The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

* libvirt: Denial of service in XML parsing (CVE-2025-12748)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 10 Release Notes linked from the References section.

Security update for libvirt

Affected: Ubuntu:Pro:14.04:LTS: libvirt, Ubuntu:Pro:16.04:LTS: libvirt, Ubuntu:Pro:18.04:LTS: libvirt, Ubuntu:Pro:20.04:LTS: libvirt, Ubuntu:22.04:LTS: libvirt, Ubuntu:24.04:LTS: libvirt, Ubuntu:25.10: libvirt, Ubuntu:26.04:LTS: libvirt

A flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.

Ein lokaler Angreifer kann eine Schwachstelle in libvirt ausnutzen, um einen Denial of Service Angriff durchzuführen.