A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libvirt | Redhat | * | 6.8.0 (excluding) |
| Advanced Virtualization for RHEL 8.2.1 | RedHat | virt:8.2-8020120201106174547.863bb0db | * |
| Advanced Virtualization for RHEL 8.2.1 | RedHat | virt-devel:8.2-8020120201106174547.863bb0db | * |
| Red Hat Enterprise Linux 7 | RedHat | libvirt-0:4.5.0-36.el7_9.3 | * |
| Red Hat Enterprise Linux 8 | RedHat | virt-devel:rhel-8040020210317013608.9f9e2e7e | * |
| Red Hat Enterprise Linux 8 | RedHat | virt:rhel-8040020210317013608.9f9e2e7e | * |
| Libvirt | Ubuntu | bionic | * |
| Libvirt | Ubuntu | esm-infra-legacy/trusty | * |
| Libvirt | Ubuntu | esm-infra/xenial | * |
| Libvirt | Ubuntu | focal | * |
| Libvirt | Ubuntu | groovy | * |
| Libvirt | Ubuntu | precise/esm | * |
| Libvirt | Ubuntu | trusty | * |
| Libvirt | Ubuntu | trusty/esm | * |
| Libvirt | Ubuntu | upstream | * |
| Libvirt | Ubuntu | xenial | * |