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pds_core: fix debugfs_lookup dentry leak and error handling

Type: advisorySources: OSV

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.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.12.92, 6.18.34, 6.6.142, 7.0.11
CVEs
CVE-2026-64147
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 14:43 UTC · Revision 1

Source evidence

pds_core: fix debugfs_lookup dentry leak and error handling

core-osv · Original source

Published 19 Jul 2026, 15:40 UTC

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.

osv:CVE-2026-64147

Kernel

Fixed versions: 6.6.142, 6.12.92, 6.18.34, 7.0.11

Complete source record
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  "url": "https://osv.dev/vulnerability/CVE-2026-64147",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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.",
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      ],
      "modified": "2026-10-28T02:30:29.745801818Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c",
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  "source_id": "core-osv",
  "document_id": 496478,
  "published_at": "2026-07-19T15:40:38.198+00:00"
}