CVE-2026-43231

/* * Conceptual PoC for Memory Leak in radio-keene driver * This code demonstrates the vulnerable logic flow. * Triggering this in a real environment requires specific hardware or fault injection. */ #include <linux/module.h> #include <linux/usb.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-device.h> static int usb_keene_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct keene_device *radio; int retval; radio = kzalloc(sizeof(struct keene_device), GFP_KERNEL); if (!radio) return -ENOMEM; // Initialize control handler retval = v4l2_ctrl_handler_init(&radio->hdl, 2); if (retval) { goto err_free_mem; } // Add controls v4l2_ctrl_new_std(&radio->hdl, &keene_ctrl_ops, V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); if (radio->hdl.error) { retval = radio->hdl.error; goto err_free_ctrl; // Vulnerable path might skip this in some versions } radio->v4l2_dev.ctrl_handler = &radio->hdl; // Simulate failure in device registration to trigger error path retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); if (retval < 0) { goto err_v4l2; // Jump to error path } // ... rest of the probe ... return 0; err_v4l2: // VULNERABILITY: Missing v4l2_ctrl_handler_free(&radio->hdl); // This causes the memory allocated for the handler to leak. v4l2_device_unregister(&radio->v4l2_dev); err_free_ctrl: v4l2_ctrl_handler_free(&radio->hdl); // This is the fix err_free_mem: kfree(radio); return retval; }

{"cve": {"id": "CVE-2026-43231", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:43.083", "lastModified": "2026-05-08T21:09:10.137", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: radio-keene: fix memory leak in error path\n\nFix a memory leak in usb_keene_probe(). The v4l2 control handler is\ninitialized and controls are added, but if v4l2_device_register() or\nvideo_register_device() fails afterward, the handler was never freed,\nleaking memory.\n\nAdd v4l2_ctrl_handler_free() call in the err_v4l2 error path to ensure\nthe control handler is properly freed for all error paths after it is\ninitialized."}], "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": "3.4", "versionEndExcluding": "5.10.252", "matchCriteriaId": "B4A81F7E-23E8-4BE4-8A43-936FF2AB9C88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.202", "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.165", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.128", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"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/1d8558a232ecb187e8e0328d6347a125f437a0fc", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/242b0aabb1866024a7995a767ac330c158b39aa4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/27c508f61963013fdf29097578284099ee7a85a4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/2fe28a63d598235595a9601e0d8fdc7c8f4fd575", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/7fa9754f48cb8eefa566156be341e63d313247e5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/ad85bb5623079a35bd400f51de2e2fbc2170bdb2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b8bf939d77c0cd01118e953bbf554e0fa15e9006", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/de204d87e7d61859937272fe30cbdd46a4cfb10a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}