CVE-2026-64147
pds_core: fix debugfs_lookup dentry leak and error handling
Description
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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
Aug. 17, 2026, 7:37 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Apply the provided patch to the Linux kernel.
- Ensure dentry reference counts are properly managed.
- Validate error handling for debugfs_lookup.
- Test system stability after applying changes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64147.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64147 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64147
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64147 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64147 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.8:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.4 up to (excluding) 6.8 *cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.16 up to (excluding) 6.6.142 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8.1 up to (excluding) 6.12.92 Added Reference Type kernel.org: https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2bbf2b1c20f934a054172175ccbabcc01fe69ef6', 'lessThan': '60ef1675b652e912f3eb064767af4432393291fd', 'versionType': 'git'}, {'status': 'affected', 'version': 'bc90fbe0c3182157d2be100a2f6c2edbb1820677', 'lessThan': '26e19622c485e53c3fdb299e822068a0542ddf0c', 'versionType': 'git'}, {'status': 'affected', 'version': 'bc90fbe0c3182157d2be100a2f6c2edbb1820677', 'lessThan': '91d13e92b983e6c6d7631012c2e20ae8057de9f2', 'versionType': 'git'}, {'status': 'affected', 'version': 'bc90fbe0c3182157d2be100a2f6c2edbb1820677', 'lessThan': 'd7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32', 'versionType': 'git'}, {'status': 'affected', 'version': 'bc90fbe0c3182157d2be100a2f6c2edbb1820677', 'lessThan': 'dc416e32baaeb620b9809e9e25fc7b30889686e9', 'versionType': 'git'}, {'status': 'affected', 'version': '3ffe14c36985e3174933127c9efad82ac8f3fefb', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.16', 'lessThan': '6.6.142', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.7.4', 'lessThan': '6.8', 'versionType': 'semver'}], 'programFiles': ['drivers/net/ethernet/amd/pds_core/debugfs.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.142', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/amd/pds_core/debugfs.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c Added Reference https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd Added Reference https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2 Added Reference https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32 Added Reference https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9