CVE-2023-53384: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53384 is a vulnerability in the Linux kernel's WiFi subsystem, specifically in the mwifiex driver. The vulnerability was discovered by Linux Verification Center (linuxtesting.org) using SVACE and was published on September 18, 2025. The issue affects the mwifiexhandleuaprxforward() function where a potential NULL pointer dereference could occur in mwifiexuapqueuebridgedpkt() due to unchecked return values from skb_copy() (NVD).

The vulnerability stems from a failure to properly validate the return value of skbcopy() in the mwifiexhandleuaprxforward() function. This could lead to a NULL pointer dereference when calling mwifiexuapqueuebridged_pkt(). The issue has been assigned a medium priority by Ubuntu, indicating moderate severity (Ubuntu).

If exploited, this vulnerability could lead to a NULL pointer dereference in the Linux kernel's WiFi subsystem, potentially causing system crashes or denial of service conditions in affected systems (NVD).

The issue has been fixed in various Linux distributions. Ubuntu has released patches for multiple versions: Ubuntu 22.04 LTS (5.15.0-94.104), Ubuntu 20.04 LTS (5.4.0-169.187), and Ubuntu 18.04 LTS with HWE (5.4.0-169.187~18.04.1). Users are advised to update their systems to the patched versions (Ubuntu).