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GHSA-387J-R42M-FPJV

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

Details

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

mtd: ubi: Release device reference on busy detach

ubi_detach_mtd_dev() obtains a device reference through ubi_get_device() before checking whether the UBI device is busy. The busy return path drops ubi->ref_count but leaves the device reference held, so the device object cannot be released after a later detach.

Drop the device reference before returning -EBUSY.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90215"
  ],
  "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\nmtd: ubi: Release device reference on busy detach\n\nubi_detach_mtd_dev() obtains a device reference through ubi_get_device()\nbefore checking whether the UBI device is busy. The busy return path drops\nubi-\u003eref_count but leaves the device reference held, so the device object\ncannot be released after a later detach.\n\nDrop the device reference before returning -EBUSY.",
  "id": "GHSA-387j-r42m-fpjv",
  "modified": "2026-09-17T18:31:55Z",
  "published": "2026-09-17T18:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90215"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90215 (GCVE-0-2026-90215)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:07 – Updated: 2026-09-17 16:07

Title

mtd: ubi: Release device reference on busy detach

Summary

In the Linux kernel, the following vulnerability has been resolved: mtd: ubi: Release device reference on busy detach ubi_detach_mtd_dev() obtains a device reference through ubi_get_device() before checking whether the UBI device is busy. The busy return path drops ubi->ref_count but leaves the device reference held, so the device object cannot be released after a later detach. Drop the device reference before returning -EBUSY.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/87812858c4c8df979…
https://git.kernel.org/stable/c/e065960366b55ab21…
https://git.kernel.org/stable/c/851c5e9a829d56cb0…
https://git.kernel.org/stable/c/31dd710cd84d5dd63…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 , < 87812858c4c8df979cb70bcd0040b925a543df6f (git) Affected: 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 , < e065960366b55ab21e6c643c30dec2a41451900b (git) Affected: 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 , < 851c5e9a829d56cb0982965f07ef8966a6722884 (git) Affected: 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 , < 31dd710cd84d5dd63c49f640d3a9f36c9699ca95 (git)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/ubi/build.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "e065960366b55ab21e6c643c30dec2a41451900b",
              "status": "affected",
              "version": "7e84c961b2eb062d2f47037dcca52dcd1d3615b5",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
          ]
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          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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            },
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              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "version": "7.2.6",
              "versionType": "semver"
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            {
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              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.9",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:07:28.071Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "datePublished": "2026-09-17T16:07:28.071Z",
    "dateReserved": "2026-09-11T19:38:34.793Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-387J-R42M-FPJV

CVE-2026-90215 (GCVE-0-2026-90215)

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