The vulnerability of the unuse_mm() function in the mm/swapfile.c module of the Linux kernel’s memory-management subsystem allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the unusemm function in the mm/swapfile.c module of the Linux kernel’s memory-management subsystem is related to the assignment of the NULL pointer. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of the...

CVE-2025-39992

CVE-2025-39992 pertains to a race in the Linux kernel between fork() and swapoff where a partially built mm is exposed, allowing traversal to hit a XA_ZERO_ENTRY and trigger a NULL pointer dereference in unuse_mm(). The public description states the bug arises from a race while duplicating the mm...