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    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
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  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89741.json"
  },
  "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.",
  "id": "CVE-2026-89741",
  "modified": "2026-09-13T03:30:34.955547058Z",
  "published": "2026-09-11T19:46:47.877Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89741.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89741"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Revert \"media: v4l2-dev: fix error handling in __video_register_device()\""
}