Vulnerability-Lookup

GHSA-7R8Q-9953-Q2XJ

Vulnerability from github – Published: 2026-01-05 12:30 – Updated: 2026-01-05 12:30

Details

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

hfs: fix potential use after free in hfs_correct_next_unused_CNID()

This code calls hfs_bnode_put(node) which drops the refcount and then dreferences "node" on the next line. It's only safe to use "node" when we're holding a reference so flip these two lines around.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68761"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-05T10:15:57Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs: fix potential use after free in hfs_correct_next_unused_CNID()\n\nThis code calls hfs_bnode_put(node) which drops the refcount and then\ndreferences \"node\" on the next line.  It\u0027s only safe to use \"node\"\nwhen we\u0027re holding a reference so flip these two lines around.",
  "id": "GHSA-7r8q-9953-q2xj",
  "modified": "2026-01-05T12:30:29Z",
  "published": "2026-01-05T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68761"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40a1e0142096dd7dd6cb5373841222b528698588"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c105e76bb17cf4b55fe89c6ad4f6a0e3972b5b08"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-68761 (GCVE-0-2025-68761)

Vulnerability from cvelistv5 – Published: 2026-01-05 09:32 – Updated: 2026-01-05 09:32

Title

hfs: fix potential use after free in hfs_correct_next_unused_CNID()

Summary

In the Linux kernel, the following vulnerability has been resolved: hfs: fix potential use after free in hfs_correct_next_unused_CNID() This code calls hfs_bnode_put(node) which drops the refcount and then dreferences "node" on the next line. It's only safe to use "node" when we're holding a reference so flip these two lines around.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/40a1e0142096dd7dd…
	https://git.kernel.org/stable/c/c105e76bb17cf4b55…

Impacted products

Vendor

Product

Version

Linux

Affected: a06ec283e125e334155fe13005c76c9f484ce759 , < 40a1e0142096dd7dd6cb5373841222b528698588 (git)
Affected: a06ec283e125e334155fe13005c76c9f484ce759 , < c105e76bb17cf4b55fe89c6ad4f6a0e3972b5b08 (git)

Linux

Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/hfs/catalog.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "40a1e0142096dd7dd6cb5373841222b528698588",
              "status": "affected",
              "version": "a06ec283e125e334155fe13005c76c9f484ce759",
              "versionType": "git"
            },
            {
              "lessThan": "c105e76bb17cf4b55fe89c6ad4f6a0e3972b5b08",
              "status": "affected",
              "version": "a06ec283e125e334155fe13005c76c9f484ce759",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/hfs/catalog.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.2",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs: fix potential use after free in hfs_correct_next_unused_CNID()\n\nThis code calls hfs_bnode_put(node) which drops the refcount and then\ndreferences \"node\" on the next line.  It\u0027s only safe to use \"node\"\nwhen we\u0027re holding a reference so flip these two lines around."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-05T09:32:33.814Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/40a1e0142096dd7dd6cb5373841222b528698588"
        },
        {
          "url": "https://git.kernel.org/stable/c/c105e76bb17cf4b55fe89c6ad4f6a0e3972b5b08"
        }
      ],
      "title": "hfs: fix potential use after free in hfs_correct_next_unused_CNID()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68761",
    "datePublished": "2026-01-05T09:32:33.814Z",
    "dateReserved": "2025-12-24T10:30:51.034Z",
    "dateUpdated": "2026-01-05T09:32:33.814Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-7R8Q-9953-Q2XJ

CVE-2025-68761 (GCVE-0-2025-68761)

Tags

Sightings

Nomenclature