CVE-2024-39500

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.9.0

Description: The vulnerability is related to a race condition between the sock map close and sk psock put functions in the Linux kernel. This can cause a null pointer dereference when the refcount of psock reaches zero, leading to a denial of service. The issue can be triggered by creating a socket, adding it to the sock map, and then closing it while another thread is deleting an element from the sock map.

Recommendations: To resolve this issue, update the Linux kernel to version 6.9.0 or later. If an update is not possible, consider applying a patch that reorders the condition in the sock map close function to avoid the race condition. Additionally, as a temporary workaround, consider disabling the sock map close function until a patch is available.