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Vulnerability DatabaseCVE-2023-53381
CVE-2023-53381:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2023-53381 was published on September 18, 2025, affecting the Linux kernel. The vulnerability involves a reference count leak in the NFSD component, specifically related to nfsd4sscumount_item (NVD).
Technical details
The vulnerability occurs when the reference count of nfsd4sscumount_item is not decremented on error conditions. This prevents the laundromat from unmounting the vfsmount of the source file. The issue has been resolved by implementing proper reference count decrementing on error conditions (Ubuntu).
Impact
The failure to properly decrement reference counts can lead to resource leaks in the system, potentially affecting the NFSD (Network File System Daemon) functionality (NVD).
Mitigation and workarounds
Multiple Linux distributions have released fixes for this vulnerability. Ubuntu has fixed this in version 5.15.0-116.126 for jammy and other affected versions. The fix has been backported to various kernel versions including linux-hwe-5.15, linux-azure, linux-gcp, and other kernel flavors (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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