CVE-2022-0897

A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).

A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).

Se ha encontrado un fallo en el controlador nwfilter de libvirt. El método virNWFilterObjListNumOfNWFilters no adquiría el mutex driver->nwfilters antes de iterar sobre las instancias virNWFilterObj. No había protección para evitar que otro hilo modificara simultáneamente el objeto driver->nwfilters. Este fallo permite a un usuario malicioso y sin privilegios aprovechar este problema a través de la API virConnectNumOfNWFilters de libvirt para bloquear el demonio de gestión de filtros de red (libvirtd/virtnwfilterd)