GHSA-98X6-774G-8659

Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

ubi: Fix rollback for explicit UBI device numbers

ubi_init_attach() rolls back module initialization failures by scanning ubi_devices[0..i-1], where i is the mtd= parameter index. That assumes the parameter index matches the UBI device number.

That assumption is not true when mtd= specifies an explicit ubi_num. A successfully attached device can be stored at a higher ubi_devices[] slot, and a later failure can miss it during rollback.

Scan the full ubi_devices[] array and detach by the actual array index, matching the way UBI devices are stored.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90216"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix rollback for explicit UBI device numbers\n\nubi_init_attach() rolls back module initialization failures by scanning\nubi_devices[0..i-1], where i is the mtd= parameter index. That assumes\nthe parameter index matches the UBI device number.\n\nThat assumption is not true when mtd= specifies an explicit ubi_num. A\nsuccessfully attached device can be stored at a higher ubi_devices[]\nslot, and a later failure can miss it during rollback.\n\nScan the full ubi_devices[] array and detach by the actual array index,\nmatching the way UBI devices are stored.",
  "id": "GHSA-98x6-774g-8659",
  "modified": "2026-09-17T18:31:56Z",
  "published": "2026-09-17T18:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90216"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4417ab6ecad01cf2d01045ef8104c95a66b0e893"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/552e565ed8846e7db143e4a6bdf3f5677453c686"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b0a6b554e12a97f9771a9a9f4ea1f5457373c73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83c978921688af40dcab6db74882d1ff9b0b765c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87b3da4acb860605643ebee312178f13b20744cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9754f049d5f1945d4c691d1f52824eb8daf8f9be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3f7e58189bc222971ddc860f1716f37e51ba996"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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