CVE-2024-40954

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free issue exists in the networking code of the Linux kernel. The problem occurs when socket creation fails, leaving a dangling sk pointer. This can be triggered by attaching an fentry probe to the sock release() function that calls the bpf get socket cookie() helper, and then executing a traceroute -I command on a freshly booted virtual machine. The flaw is located within the sk common release() function in the net/core/sock.c module. A use-after-free is a condition where a program continues to use a pointer after the memory it points to has been freed, which can lead to crashes or unauthorized data access.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.