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GHSA-J9R6-V9MW-FJH8

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

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

btrfs: restore active device pointers after failed sprout

btrfs_init_new_device() switches latest_dev and possibly s_bdev from the seed device to the new sprout device before creating the first writable chunks.

If chunk creation or the subsequent sprout setup fails, the error path releases the new device without switching those pointers back. btrfs_show_devname() can then dereference the freed latest_dev and crash.

Restore the active device pointers to the latest seed device before removing and releasing the failed sprout device.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98090"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: restore active device pointers after failed sprout\n\nbtrfs_init_new_device() switches latest_dev and possibly s_bdev from the\nseed device to the new sprout device before creating the first writable\nchunks.\n\nIf chunk creation or the subsequent sprout setup fails, the error path\nreleases the new device without switching those pointers back.\nbtrfs_show_devname() can then dereference the freed latest_dev and crash.\n\nRestore the active device pointers to the latest seed device before\nremoving and releasing the failed sprout device.",
  "id": "GHSA-j9r6-v9mw-fjh8",
  "modified": "2026-09-25T12:31:36Z",
  "published": "2026-09-25T12:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98090"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b79b4b29003690acfade8241998fc0104ef9c84c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0b54613aabeb8e9da597f23b90c6a03d0981986"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e127ac29a52134d0f4cba39d38e4b375deb3d1aa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98090 (GCVE-0-2026-98090)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-09-25 10:24

Title

btrfs: restore active device pointers after failed sprout

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: restore active device pointers after failed sprout btrfs_init_new_device() switches latest_dev and possibly s_bdev from the seed device to the new sprout device before creating the first writable chunks. If chunk creation or the subsequent sprout setup fails, the error path releases the new device without switching those pointers back. btrfs_show_devname() can then dereference the freed latest_dev and crash. Restore the active device pointers to the latest seed device before removing and releasing the failed sprout device.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/2ee5c4bc11007c51f…
https://git.kernel.org/stable/c/e127ac29a52134d0f…
https://git.kernel.org/stable/c/b79b4b29003690acf…
https://git.kernel.org/stable/c/e0b54613aabeb8e9d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b7cb29e666fe79dda5dbe5f57fb7c92413bf161c , < 2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7 (git) Affected: b7cb29e666fe79dda5dbe5f57fb7c92413bf161c , < e127ac29a52134d0f4cba39d38e4b375deb3d1aa (git) Affected: b7cb29e666fe79dda5dbe5f57fb7c92413bf161c , < b79b4b29003690acfade8241998fc0104ef9c84c (git) Affected: b7cb29e666fe79dda5dbe5f57fb7c92413bf161c , < e0b54613aabeb8e9da597f23b90c6a03d0981986 (git) Affected: a6e7e218a4d6488d56727a7d9aee1b7e78c0c485 (git) Affected: 5.15.11 , < 5.16 (semver)
Linux	Linux	Affected: 5.16 Unaffected: 0 , < 5.16 (semver) Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/volumes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "b7cb29e666fe79dda5dbe5f57fb7c92413bf161c",
              "versionType": "git"
            },
            {
              "lessThan": "e127ac29a52134d0f4cba39d38e4b375deb3d1aa",
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              "version": "b7cb29e666fe79dda5dbe5f57fb7c92413bf161c",
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            },
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              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a6e7e218a4d6488d56727a7d9aee1b7e78c0c485",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "5.15.11",
              "versionType": "semver"
            }
          ]
        },
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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              "version": "5.16"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:24:23.474Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "datePublished": "2026-09-25T10:24:23.474Z",
    "dateReserved": "2026-09-25T10:19:56.075Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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-J9R6-V9MW-FJH8

CVE-2026-98090 (GCVE-0-2026-98090)

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