CVE-2024-50094

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sfc: No invoque xdp_do_flush() desde netpoll. Yury informó de un fallo en el controlador sfc originado desde netpoll_send_udp(). La netconsole envía un mensaje y luego netpoll invoca la función NAPI del controlador con un presupuesto de cero. Está dedicada a permitir que el controlador libere recursos TX, que puede haber usado al enviar el paquete. En el caso de netpoll, el controlador invoca xdp_do_flush() incondicionalmente, lo que provoca un fallo porque bpf_net_context nunca se asignó. Invoque xdp_do_flush() solo si el presupuesto no es cero.

In the Linux kernel, the following vulnerability has been resolved: sfc: Don't invoke xdp_do_flush() from netpoll. Yury reported a crash in the sfc driver originated from netpoll_send_udp(). The netconsole sends a message and then netpoll invokes the driver's NAPI function with a budget of zero. It is dedicated to allow driver to free TX resources, that it may have used while sending the packet. In the netpoll case the driver invokes xdp_do_flush() unconditionally, leading to crash because bpf_net_context was never assigned. Invoke xdp_do_flush() only if budget is not zero.

Attila Szász discovered that the HFS+ file system implementation in the Linux Kernel contained a heap overflow vulnerability. An attacker could use a specially crafted file system image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.