FKIE_CVE-2026-64147

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-19 16:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "60ef1675b652e912f3eb064767af4432393291fd",
              "status": "affected",
              "version": "2bbf2b1c20f934a054172175ccbabcc01fe69ef6",
              "versionType": "git"
            },
            {
              "lessThan": "26e19622c485e53c3fdb299e822068a0542ddf0c",
              "status": "affected",
              "version": "bc90fbe0c3182157d2be100a2f6c2edbb1820677",
              "versionType": "git"
            },
            {
              "lessThan": "91d13e92b983e6c6d7631012c2e20ae8057de9f2",
              "status": "affected",
              "version": "bc90fbe0c3182157d2be100a2f6c2edbb1820677",
              "versionType": "git"
            },
            {
              "lessThan": "d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32",
              "status": "affected",
              "version": "bc90fbe0c3182157d2be100a2f6c2edbb1820677",
              "versionType": "git"
            },
            {
              "lessThan": "dc416e32baaeb620b9809e9e25fc7b30889686e9",
              "status": "affected",
              "version": "bc90fbe0c3182157d2be100a2f6c2edbb1820677",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3ffe14c36985e3174933127c9efad82ac8f3fefb",
              "versionType": "git"
            },
            {
              "lessThan": "6.6.142",
              "status": "affected",
              "version": "6.6.16",
              "versionType": "semver"
            },
            {
              "lessThan": "6.8",
              "status": "affected",
              "version": "6.7.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
  "id": "CVE-2026-64147",
  "lastModified": "2026-07-19T16:17:56.643",
  "metrics": {},
  "published": "2026-07-19T16:17:56.643",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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