CVE-2026-98081 (GCVE-0-2026-98081)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-09-25 10:24
VLAI
Title
btrfs: zoned: finish active block group cleanup if call_zone_finish() fails
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: finish active block group cleanup if call_zone_finish() fails do_zone_finish() clears BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE before finishing the zones. If call_zone_finish() then fails it returned early, leaving the now inactive block group on fs_info->zone_active_bgs, leaking its reference, the BTRFS_FS_NEED_ZONE_FINISH waiters are never woken, and as its alloc_offset equals the zone capacity btrfs_zone_finish_one_bg() keeps selecting it, spinning btrfs_zoned_activate_one_bg(). Fall through to the cleanup on failure too and return the error, but keep the block group read-only as its zones are left inconsistent.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d70cbdda75da3f258118a558c087157e073229fb , < 36b9cdab44848f25879ca625275c92b007f84653 (git)
Affected: d70cbdda75da3f258118a558c087157e073229fb , < 40370f02a1ca3760f8925ffcbe76eb4d91ea758d (git)
Affected: d70cbdda75da3f258118a558c087157e073229fb , < e1b168a53174b385e3548bfbd079513b22ac240c (git)
Affected: d70cbdda75da3f258118a558c087157e073229fb , < a18a6b93a2843b9d103d3456bbd4b3f90282a379 (git)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (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": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/zoned.c"
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              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: finish active block group cleanup if call_zone_finish() fails\n\ndo_zone_finish() clears BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE before finishing\nthe zones. If call_zone_finish() then fails it returned early, leaving the\nnow inactive block group on fs_info-\u003ezone_active_bgs, leaking its\nreference, the BTRFS_FS_NEED_ZONE_FINISH waiters are never woken, and as\nits alloc_offset equals the zone capacity btrfs_zone_finish_one_bg() keeps\nselecting it, spinning btrfs_zoned_activate_one_bg().\n\nFall through to the cleanup on failure too and return the error, but keep\nthe block group read-only as its zones are left inconsistent."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:24:18.091Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/36b9cdab44848f25879ca625275c92b007f84653"
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/a18a6b93a2843b9d103d3456bbd4b3f90282a379"
        }
      ],
      "title": "btrfs: zoned: finish active block group cleanup if call_zone_finish() fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98081",
    "datePublished": "2026-09-25T10:24:18.091Z",
    "dateReserved": "2026-09-25T10:19:56.075Z",
    "dateUpdated": "2026-09-25T10:24:18.091Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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          {
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                "programFiles": [
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                    "versionType": "semver"
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                    "version": "7.2.7",
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            ],
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: finish active block group cleanup if call_zone_finish() fails\n\ndo_zone_finish() clears BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE before finishing\nthe zones. If call_zone_finish() then fails it returned early, leaving the\nnow inactive block group on fs_info-\u003ezone_active_bgs, leaking its\nreference, the BTRFS_FS_NEED_ZONE_FINISH waiters are never woken, and as\nits alloc_offset equals the zone capacity btrfs_zone_finish_one_bg() keeps\nselecting it, spinning btrfs_zoned_activate_one_bg().\n\nFall through to the cleanup on failure too and return the error, but keep\nthe block group read-only as its zones are left inconsistent."
          }
        ],
        "id": "CVE-2026-98081",
        "lastModified": "2026-09-25T11:17:37.573",
        "metrics": {},
        "published": "2026-09-25T11:17:37.573",
        "references": [
          {
            "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.

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