CVE-2025-38640 — Race Condition within a Thread in Linux

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable migration in nf_hook_run_bpf(). syzbot reported that the netfilter bpf prog can be called without migration disabled in xmit path. Then the assertion in __bpf_prog_run() fails, triggering the splat below. [0] Let's use bpf_prog_run_pin_on_cpu() in nf_hook_run_bpf(). [0]: BUG: assuming non migratable context at ./include/linux/filter.h:703 in_atomic(): 0, irqs_disabled(): 0, migration_disabled() 0 pid: 5829, nam…