CVE-2026-43379

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

Description A use-after-free issue exists in the smb lazy parent lease break close() function. The opinfo pointer, obtained via rcu dereference(fp->f opinfo), is accessed after rcu read unlock() is called. This creates a race condition where concurrent writers may free the memory between the unlock and subsequent pointer dereferences, such as opinfo->is lease.

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