CVE-2021-47086

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: phonet/pep: se niega a habilitar una tubería independiente. Este ioctl() supone implícitamente que el socket ya estaba vinculado a un nombre de socket local válido, es decir, objeto Phonet. Si el socket no estuviera vinculado, se producirían dos problemas distintos: 1) Enviamos una solicitud de habilitación de canalización con un objeto fuente no válido. 2) Las llamadas de socket posteriores podrían ERROR en el socket que se conecta inesperadamente pero no está vinculado a un objeto válido.

In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object.

Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driver in the Linux kernel during device removal. A privileged attacker could use this to cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.