Vulnerability-Lookup

GHSA-V7MH-G6GQ-FVRQ

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32

Details

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

btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots()

If we have an unexpected reloc_root for our root, we jump to the out label but never drop the reference we obtained for root, resulting in a leak. Add a missing btrfs_put_root() call.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68422"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots()\n\nIf we have an unexpected reloc_root for our root, we jump to the out label\nbut never drop the reference we obtained for root, resulting in a leak.\nAdd a missing btrfs_put_root() call.",
  "id": "GHSA-v7mh-g6gq-fvrq",
  "modified": "2026-08-19T18:32:19Z",
  "published": "2026-08-10T15:33:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68422"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f586b4c92e4272fcd01bf0db0590b63acf3e85b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60a23d4ea169e27403f3bb023bb98036797c0206"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72f673d1c1deb819554d3e7e154f6d84301eb735"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7591d1727067d6063247901ad25c4bdc4e5695c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3d39b03799600c76c33486e2d29b73a771023db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce6050bafb4e33377dc17fcc357736bfc351180c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f89df93e8aefa4c1c813f835559f2ac727f79766"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68422 (GCVE-0-2026-68422)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-19 16:35

Title

btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots()

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots() If we have an unexpected reloc_root for our root, we jump to the out label but never drop the reference we obtained for root, resulting in a leak. Add a missing btrfs_put_root() call.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/f89df93e8aefa4c1c…
https://git.kernel.org/stable/c/3f586b4c92e4272fc…
https://git.kernel.org/stable/c/b3d39b03799600c76…
https://git.kernel.org/stable/c/72f673d1c1deb8195…
https://git.kernel.org/stable/c/60a23d4ea169e2740…
https://git.kernel.org/stable/c/7591d1727067d6063…
https://git.kernel.org/stable/c/ce6050bafb4e33377…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < f89df93e8aefa4c1c813f835559f2ac727f79766 (git) Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < 3f586b4c92e4272fcd01bf0db0590b63acf3e85b (git) Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < b3d39b03799600c76c33486e2d29b73a771023db (git) Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < 72f673d1c1deb819554d3e7e154f6d84301eb735 (git) Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < 60a23d4ea169e27403f3bb023bb98036797c0206 (git) Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < 7591d1727067d6063247901ad25c4bdc4e5695c4 (git) Affected: 24213fa46c7080c31d79aa2e3e2f0d9480cab700 , < ce6050bafb4e33377dc17fcc357736bfc351180c (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/relocation.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "24213fa46c7080c31d79aa2e3e2f0d9480cab700",
              "versionType": "git"
            },
            {
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              "version": "24213fa46c7080c31d79aa2e3e2f0d9480cab700",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            },
            {
              "lessThan": "7591d1727067d6063247901ad25c4bdc4e5695c4",
              "status": "affected",
              "version": "24213fa46c7080c31d79aa2e3e2f0d9480cab700",
              "versionType": "git"
            },
            {
              "lessThan": "ce6050bafb4e33377dc17fcc357736bfc351180c",
              "status": "affected",
              "version": "24213fa46c7080c31d79aa2e3e2f0d9480cab700",
              "versionType": "git"
            }
          ]
        },
        {
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          "programFiles": [
            "fs/btrfs/relocation.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.13",
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                },
                {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
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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: fix root leak if its reloc root is unexpected in merge_reloc_roots()\n\nIf we have an unexpected reloc_root for our root, we jump to the out label\nbut never drop the reference we obtained for root, resulting in a leak.\nAdd a missing btrfs_put_root() call."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:35:17.540Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f89df93e8aefa4c1c813f835559f2ac727f79766"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f586b4c92e4272fcd01bf0db0590b63acf3e85b"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3d39b03799600c76c33486e2d29b73a771023db"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ce6050bafb4e33377dc17fcc357736bfc351180c"
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      ],
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  "cveMetadata": {
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    "datePublished": "2026-08-10T12:04:42.949Z",
    "dateReserved": "2026-07-30T09:28:09.392Z",
    "dateUpdated": "2026-08-19T16:35:17.540Z",
    "state": "PUBLISHED"
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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.

Detection rules are retrieved from Rulezet.

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-V7MH-G6GQ-FVRQ

CVE-2026-68422 (GCVE-0-2026-68422)

Tags

Sightings

Nomenclature