CVE-2023-53390: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53390 is a memory leak vulnerability discovered in the Linux kernel's drivers base subsystem. The issue specifically relates to the debugfs_lookup() function, where memory leaks occur when the function result is not properly handled with dput() (Ubuntu Security).

The vulnerability occurs in the Linux kernel's driver base subsystem where calling debugfslookup() without a corresponding dput() call leads to memory leaks over time. The technical fix involves replacing debugfslookup() with debugfslookupand_remove() which handles all the required logic in a single call, preventing memory leaks (Ubuntu Security).

The vulnerability can result in gradual memory leaks in affected systems over time, potentially leading to system performance degradation and resource exhaustion (Ubuntu Security).

Multiple Linux distributions have released patches to address this vulnerability. Ubuntu has fixed this in various kernel versions including linux-azure (5.15.0-1045.52), linux-gke (5.15.0-1039.44), and linux-intel-iotg (5.15.0-1037.42). Users are advised to update their systems to the latest available kernel version (Ubuntu Security).