{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89741",
  "modified": "2026-10-07T14:35:31Z",
  "upstream": [
    "CVE-2026-89741"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "Revert \"media: v4l2-dev: fix error handling in __video_register_device()\"",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"media: v4l2-dev: fix error handling in __video_register_device()\"\n\nThis reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a.\n\nThe intentions of that patch were good, but it doesn't work.\n\nThe idea is that if device_register fails, you have to do a put_device\nto let the ref counter release resources.\n\nHowever, the V4L2 API says that if video_register_device() fails, then\nyou have to call video_device_release(), which kfree()s the video_device\nstruct.\n\nBut the put_device() will already have freed the struct, so you end\nup in a double-free scenario.\n\nThere is not really a good way of fixing this without breaking\nvideo_register_device() into two parts, one that initializes everything,\nand one that does the actual device_register, and then converting all\nV4L2 drivers to this new model.\n\nThat is a massive job, and it is very unlikely that device_register\nwill fail.\n\nSo rather than ending up in a double-free scenario, just revert this\npatch, and in that case we'll have a small memory leak. Which is a lot\nmore robust.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89741"
    },
    {
      "type": "FIX",
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
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