CVE-2026-43312

/* * PoC Concept for CVE-2026-43312 * This vulnerability is triggered during the driver initialization (probe). * It requires a system with the vulnerable ov5647 driver hardware. * * The crash occurs when ov5647_init_controls() is called before * v4l2_i2c_subdev_init(), and an error path is hit. */ #include <linux/module.h> #include <linux/i2c.h> // Simulating the vulnerable flow static int simulate_vulnerable_probe(struct i2c_client *client) { struct v4l2_subdev *sd; // VULNERABILITY: init_controls called before subdev init // Inside ov5647_init_controls, v4l2_get_subdevdata(sd) returns NULL // because sd is not yet initialized by v4l2_i2c_subdev_init. int ret = ov5647_init_controls(sd); if (ret < 0) { // If ret is error, cleanup code tries to access i2c_client // via v4l2_get_subdevdata(sd), which is NULL. // This causes a Null Pointer Dereference -> Kernel Panic. goto error_handler; } // Correct initialization should happen here, but it's too late. v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops); return 0; error_handler: // Crash happens here accessing uninitialized data return ret; }

{"cve": {"id": "CVE-2026-43312", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T14:16:39.587", "lastModified": "2026-05-15T17:22:24.033", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: i2c: ov5647: Initialize subdev before controls\n\nIn ov5647_init_controls() we call v4l2_get_subdevdata, but it is\ninitialized by v4l2_i2c_subdev_init() in the probe, which currently\nhappens after init_controls(). This can result in a segfault if the\nerror condition is hit, and we try to access i2c_client, so fix the\norder."}], "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": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.15.202", "matchCriteriaId": "D50913C4-6689-4F0C-A587-7397F492A17C"}, {"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/2dedda97a64e7735844609c6c77c0dd953d73833", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/59e372aa4cf60e2500eba7f978acdcb18bb49032", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/8ecb21c20387cc0c8aa00489a21ccc69f6b0f5d1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/cabd025182cfed4a19b3aab57493e312d681e398", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/eee13cbccacb6d0a3120c126b8544030905b069d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/f2a1998bc0053ebfe137f65081ed13afd9f34502", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/fb69e4842f5b463ff5f121d2ac7746014e3477ea", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}