media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure

{
  "id": "a154b08422e9ff851ab2d9ce6a063a3d48a7956fd247fda9daa5979ad0884852",
  "url": "https://osv.dev/vulnerability/CVE-2026-89871",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure kthread_run() returns an ERR_PTR on failure, not NULL. When start_streaming() fails, data->kthread_vid_cap is left holding this error pointer instead of being cleared. This causes two subsequent bugs: 1. A future call to start_streaming() sees a non-NULL kthread_vid_cap and returns 0 (success) immediately, without actually starting the capture thread. 2. A call to stop_streaming() checks 'kthread_vid_cap == NULL' which is false for an error pointer, and proceeds to call kthread_stop() on the error pointer, leading to a kernel crash. Fix this by resetting kthread_vid_cap to NULL on failure before jumping to the error path.",
    "evidence": "osv:CVE-2026-89871",
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    "severity": "unknown",
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      "modified": "2026-10-28T02:30:29.532683298Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e7f2cd72a4f9268ee09a13b13f3339e7cc71557",
        "https://git.kernel.org/stable/c/0fac63cac6689588da530764ccb6ba55ee8e4d8b",
        "https://git.kernel.org/stable/c/3d1b10d81fe54852ed953f4129577b733bbd6907",
        "https://git.kernel.org/stable/c/52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6",
        "https://git.kernel.org/stable/c/5c35d380bea60503c4fe0986fe1de6a3263282b3",
        "https://git.kernel.org/stable/c/76e379754ba618989f6215be608d5c04774a611d",
        "https://git.kernel.org/stable/c/968c5213e34c48d35febdfd09cf3dc58ad039140",
        "https://git.kernel.org/stable/c/db0f4531aa55cfb0171684ebfffe3ff04b79d5a8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89871.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89871",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89871.json"
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 496418,
  "published_at": "2026-09-16T10:31:39.961+00:00"
}