CVE-2023-53173 Details
Description
In the Linux kernel, the following vulnerability has been resolved: tty: pcn_uart: fix memory leak with using debugfs_lookup() When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once.
A memory leak vulnerability has been identified in the Linux kernel's PCN UART TTY driver. The issue arises when the debugfs_lookup() function is called; the result must be followed by a dput() call to prevent memory leakage. Failure to do so can lead to a gradual accumulation of unreleased memory. The vulnerability affects the Linux kernel stable tree.
The vulnerability has been addressed in the Linux kernel by modifying the PCN UART TTY driver to use debugfs_lookup_and_remove(), which automatically handles the memory management correctly. Users should upgrade to the latest version of the Linux kernel where this fix has been applied.
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/04a189c720aa2b6091442113ce9b9bc93552dff8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/139769c4bd8273b5e3f85ea474aa37018fe7e436 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4459d1e7bd0421b3b6fcd745773d8823f71615ef | kernel.org | Patch |
| https://git.kernel.org/stable/c/cf042964c2fa72950bbbf25b2cdd732b873e89db | 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 | < 5.15.100 >= 5.16, < 6.1.18 >= 6.2, < 6.2.5 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 2, 2025 | Initial Analysis | [email protected] |
| Sep 15, 2025 | New CVE Received | kernel.org |