CVE-2025-21641

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

Description The issue concerns the Linux kernel, specifically the mptcp subsystem and its handling of the blackhole timeout via sysctl. The problem arises from using the net structure via current, which is not recommended due to inconsistency and potential null pointer dereferences. This can lead to errors, particularly when the current task is exiting. The pernet structure can be obtained from the table->data using container of().

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