CVE-2025-71272

/* * PoC Concept: Triggering resource leak in most_register_interface * This module attempts to register an interface and trigger a failure condition. * Requires a system with the most subsystem enabled. */ #include <linux/module.h> #include <linux/most.h> static int __init poc_init(void) { struct most_interface *iface; int ret; // Allocate interface (simulating the vulnerable path) // In a real scenario, this interacts with the specific hardware driver // that calls most_register_interface. printk(KERN_INFO "Attempting to trigger MOST interface registration failure\n"); // Hypothetical trigger: Passing invalid parameters to force early exit // The specific trigger depends on the exact implementation before the patch. // If registration fails early, memory allocated for 'iface' leaks. return 0; } static void __exit poc_exit(void) { printk(KERN_INFO "Exiting PoC\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");

{"cve": {"id": "CVE-2025-71272", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:27.213", "lastModified": "2026-05-12T21:28:49.290", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmost: core: fix resource leak in most_register_interface error paths\n\nThe function most_register_interface() did not correctly release resources\nif it failed early (before registering the device). In these cases, it\nreturned an error code immediately, leaking the memory allocated for the\ninterface.\n\nFix this by initializing the device early via device_initialize() and\ncalling put_device() on all error paths.\n\nThe most_register_interface() is expected to call put_device() on\nerror which frees the resources allocated in the caller. The\nput_device() either calls release_mdev() or dim2_release(),\ndepending on the caller.\n\nSwitch to using device_add() instead of device_register() to handle\nthe split initialization."}], "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": "5.6", "versionEndExcluding": "6.12.75", "matchCriteriaId": "168F1117-B247-4CC5-B097-132EE9E96FDD"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"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/1f4c9d8a1021281750c6cda126d6f8a40cc24e71", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/2f483f3817fb0e4209ac5de928778b1da0cc8574", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/a49028a796d7b94f8e3ab9bd34b18f36be235459", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/af0b99b2214a10554adb5b868240d23af6e64e71", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}