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

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-09-25 10:24
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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": {
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "fs/btrfs/volumes.c"
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      "cpeApplicability": [
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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\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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:24:23.474Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
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      "title": "btrfs: restore active device pointers after failed sprout",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98090",
    "datePublished": "2026-09-25T10:24:23.474Z",
    "dateReserved": "2026-09-25T10:19:56.075Z",
    "dateUpdated": "2026-09-25T10:24:23.474Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "programFiles": [
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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": "CVE-2026-98090",
        "lastModified": "2026-09-25T11:17:38.697",
        "metrics": {},
        "published": "2026-09-25T11:17:38.697",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.