CVE-2026-90216 (GCVE-0-2026-90216)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 08:59
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
Version: 83ff59a066637a6c28844bbf43009459408240f4
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{
  "containers": {
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          "programFiles": [
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              "version": "0",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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              "cpeMatch": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:59:52.143Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/83c978921688af40dcab6db74882d1ff9b0b765c"
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          "url": "https://git.kernel.org/stable/c/6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5"
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          "url": "https://git.kernel.org/stable/c/4417ab6ecad01cf2d01045ef8104c95a66b0e893"
        },
        {
          "url": "https://git.kernel.org/stable/c/552e565ed8846e7db143e4a6bdf3f5677453c686"
        },
        {
          "url": "https://git.kernel.org/stable/c/9754f049d5f1945d4c691d1f52824eb8daf8f9be"
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        {
          "url": "https://git.kernel.org/stable/c/e3f7e58189bc222971ddc860f1716f37e51ba996"
        },
        {
          "url": "https://git.kernel.org/stable/c/87b3da4acb860605643ebee312178f13b20744cf"
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        {
          "url": "https://git.kernel.org/stable/c/5b0a6b554e12a97f9771a9a9f4ea1f5457373c73"
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      ],
      "title": "ubi: Fix rollback for explicit UBI device numbers",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90216",
    "datePublished": "2026-09-17T16:07:28.730Z",
    "dateReserved": "2026-09-11T19:38:34.793Z",
    "dateUpdated": "2026-10-19T08:59:52.143Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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