CVE-2026-64147 Details
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.
A reference leak vulnerability has been identified in the Linux kernel's PDS core component. The issue arises because the debugfs_lookup() function returns a dentry with an elevated reference count that must be released with dput(). However, the current implementation discards this dentry without calling dput(), leading to a reference leak on each firmware reset recovery. Furthermore, when CONFIG_DEBUG_FS is disabled, debugfs_lookup() returns an error pointer indicating that the device is not available, rather than NULL. The existing error handling incorrectly processes this, potentially causing a system crash.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c | kernel.org | Patch |
| https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd | kernel.org | Patch |
| https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32 | kernel.org | Patch |
| https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-401 | Missing Release of Memory after Effective Lifetime | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.6.16, < 6.6.142 >= 6.7.4, < 6.8 >= 6.8.1, < 6.12.92 >= 6.13, < 6.18.34 >= 6.19, < 7.0.11 6.8 - 6.8 rc3 6.8 rc4 6.8 rc5 6.8 rc6 6.8 rc7 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 17, 2026 | Initial Analysis | [email protected] |
| Jul 19, 2026 | New CVE Received | kernel.org |