From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Vulnerability Type: When using the function, if the same socket is released by another thread during data transmission, it may cause the thread using to release data that has already been sent. - Trigger Conditions: - Thread A creates an skb with the flag and sets . - Thread A continues sending data from but is blocked by . - Meanwhile, Thread B calls , completes data transmission, and places the skb into the write queue. - Thread A encounters an error and eventually releases the skb containing data that has already been sent. - The function then releases the skb in the write queue that has already been sent. 2. Vulnerability Impact: - This situation causes the function to release an skb in the write queue that has already been transmitted, resulting in the thread using releasing data that has already been sent. 3. Mitigation Measures: - The function has been fixed by adding a per-sk mutex and serializing the function. 4. Patch Content: - Added the structure in the file. - Modified the function in by adding and to ensure synchronization during data transmission. 5. Patch Application: - The function has been fixed to ensure synchronization during data transmission, preventing Thread A from releasing data that has already been sent after Thread B completes transmission and releases the skb. These details indicate that the vulnerability arises from concurrent operations between threads, and the mitigation primarily involves adding synchronization mechanisms to ensure proper coordination during data transmission.