Linux Kernel X.25 Subsystem Memory Leak Vulnerability

A memory leak vulnerability has been identified in the Linux kernel's X.25 subsystem, specifically within the 'net/x25' component. The issue arises in the 'x25_lapb_receive_frame()' function, where 'skb_copy()' is used to create a private copy of the socket buffer (skb). The newly created skb is not properly freed in the error handling path for undersized or fragmented skb, leading to a memory leak.

Impact

Exploitation of this vulnerability causes a memory leak, which can lead to increased memory usage and potential exhaustion of system resources over time.