Two Linux fixes show how extended Berkeley Packet Filter (eBPF) security can fail when mutable map data crosses into the exec path, where Linux starts a program.
A new arm64 Kernel-based Virtual Machine (KVM) merge tightens two ordinary-looking mechanisms with major security weight: page mappings for protected-hypervisor stacks and the lifetime of memory-management state used by nested virtual machines.
Linux is not a standard environment. An enterprise can run many different flavors of Linux on its servers, desktops and specialized systems, each with its own set of software packages, dependencies and updates.
A Linux USB/IP timer can restart after device teardown has begun, leaving the kernel callback able to use a virtual controller that has already been freed.