CVE-2023-53379: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53379 is a memory leak vulnerability discovered in the Linux kernel, specifically in the USB PHY Tahvo driver (phy-tahvo). The issue was identified and disclosed on September 18, 2025, affecting the tahvousbprobe() function in drivers/usb/phy/phy-tahvo.c (NVD).

The vulnerability occurs in the tahvousbprobe() function where there is a missing unwind goto statement. After getting an IRQ, if ret < 0, the function returns without proper error handling to free allocated memory, resulting in a memory leak (NVD).

The vulnerability could lead to memory resource exhaustion in affected systems using the Tahvo USB PHY driver. Multiple Linux distributions and versions are affected, including various Ubuntu releases where fixes have been implemented (Ubuntu).

Several Linux distributions have released patches to address this vulnerability. Ubuntu has implemented fixes across multiple kernel versions, including linux-azure (5.15.0-1049.56), linux-kvm (5.15.0-1044.49), and linux-gke (5.15.0-1044.52). Users are advised to update their systems to the patched versions (Ubuntu).