Vulnerability-Lookup

GHSA-W83R-V6F6-JQ46

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-08-17 21:31

Details

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

pds_core: fix debugfs_lookup dentry leak and error handling

debugfs_lookup() returns a dentry with an elevated reference count that must be released with dput(). The current code discards the returned dentry without calling dput(), causing a reference leak on every firmware reset recovery.

Additionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup() returns ERR_PTR(-ENODEV), not NULL. The current check passes for error pointers and would call dput() on an invalid pointer, causing a crash.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64147"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:56Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npds_core: fix debugfs_lookup dentry leak and error handling\n\ndebugfs_lookup() returns a dentry with an elevated reference count that\nmust be released with dput(). The current code discards the returned\ndentry without calling dput(), causing a reference leak on every\nfirmware reset recovery.\n\nAdditionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup()\nreturns ERR_PTR(-ENODEV), not NULL. The current check passes for error\npointers and would call dput() on an invalid pointer, causing a crash.",
  "id": "GHSA-w83r-v6f6-jq46",
  "modified": "2026-08-17T21:31:12Z",
  "published": "2026-07-19T18:31:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64147"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-64147 (GCVE-0-2026-64147)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40

Title

pds_core: fix debugfs_lookup dentry leak and error handling

Summary

In the Linux kernel, the following vulnerability has been resolved: pds_core: fix debugfs_lookup dentry leak and error handling debugfs_lookup() returns a dentry with an elevated reference count that must be released with dput(). The current code discards the returned dentry without calling dput(), causing a reference leak on every firmware reset recovery. Additionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup() returns ERR_PTR(-ENODEV), not NULL. The current check passes for error pointers and would call dput() on an invalid pointer, causing a crash.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

5 references

URL	Tags
https://git.kernel.org/stable/c/60ef1675b652e912f…
https://git.kernel.org/stable/c/26e19622c485e53c3…
https://git.kernel.org/stable/c/91d13e92b983e6c6d…
https://git.kernel.org/stable/c/d7f4dd4c8fb380898…
https://git.kernel.org/stable/c/dc416e32baaeb620b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2bbf2b1c20f934a054172175ccbabcc01fe69ef6 , < 60ef1675b652e912f3eb064767af4432393291fd (git) Affected: bc90fbe0c3182157d2be100a2f6c2edbb1820677 , < 26e19622c485e53c3fdb299e822068a0542ddf0c (git) Affected: bc90fbe0c3182157d2be100a2f6c2edbb1820677 , < 91d13e92b983e6c6d7631012c2e20ae8057de9f2 (git) Affected: bc90fbe0c3182157d2be100a2f6c2edbb1820677 , < d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32 (git) Affected: bc90fbe0c3182157d2be100a2f6c2edbb1820677 , < dc416e32baaeb620b9809e9e25fc7b30889686e9 (git) Affected: 3ffe14c36985e3174933127c9efad82ac8f3fefb (git) Affected: 6.6.16 , < 6.6.142 (semver) Affected: 6.7.4 , < 6.8 (semver)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
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        {
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          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/debugfs.c"
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              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
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            },
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              "versionType": "original_commit_for_fix"
            }
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        }
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npds_core: fix debugfs_lookup dentry leak and error handling\n\ndebugfs_lookup() returns a dentry with an elevated reference count that\nmust be released with dput(). The current code discards the returned\ndentry without calling dput(), causing a reference leak on every\nfirmware reset recovery.\n\nAdditionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup()\nreturns ERR_PTR(-ENODEV), not NULL. The current check passes for error\npointers and would call dput() on an invalid pointer, causing a crash."
        }
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    "dateReserved": "2026-07-19T07:54:57.037Z",
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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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GHSA-W83R-V6F6-JQ46

CVE-2026-64147 (GCVE-0-2026-64147)

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