CVE-2026-43218

/* * PoC Concept for CVE-2026-43218 * This snippet demonstrates the logic flaw where allocated memory is not freed on error. */ #include <linux/module.h> #include <media/v4l2-ctrls.h> // Simulating the vulnerable driver logic static int vulnerable_probe_logic(void) { struct v4l2_ctrl_handler *handler; int ret; // Step 1: Initialize control handler (Allocates memory) handler = kzalloc(sizeof(*handler), GFP_KERNEL); if (!handler) return -ENOMEM; v4l2_ctrl_handler_init(handler, 4); // Step 2: Add standard controls (Allocates more memory) v4l2_ctrl_new_std(handler, NULL, V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); // Step 3: Simulate a failure condition (e.g., hardware check fails) if (1) { // Forced failure for demonstration // VULNERABILITY: v4l2_ctrl_handler_free(handler) is missing here. // The function returns error, leaking the memory allocated above. pr_err("Probe failed, leaking memory.\n"); return -ENODEV; } // Normal path v4l2_ctrl_handler_free(handler); return 0; }

{"cve": {"id": "CVE-2026-43218", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:41.413", "lastModified": "2026-05-11T19:27:37.530", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: i2c/tw9903: Fix potential memory leak in tw9903_probe()\n\nIn one of the error paths in tw9903_probe(), the memory allocated in\nv4l2_ctrl_handler_init() and v4l2_ctrl_new_std() is not freed. Fix that\nby calling v4l2_ctrl_handler_free() on the handler in that error path."}], "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": "3.10", "versionEndExcluding": "5.10.252", "matchCriteriaId": "FC824489-530D-444B-A3EF-B0BEC674899B"}, {"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/32f0493506313775d3bd448de34762b6538da6bd", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/92537a15780b6d0281fd8286f93fbc3652e35f48", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9cb9eca33d20316ed3c7a938793b8735ac3e128b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9cea16fea47e5553f51d10957677ff735b1eff03", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/a114918270f0d95c607d69b03a244e6afe54813f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/add02a3fb1fd71b004f0ed824cbac00f850de558", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/cc7aeed33e4f55c76f35f0fca73e4dfe12a63a3a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/e54aa17c968c4de2c5f7b7ea390c63d33c07513b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}