CVE-2023-52940

Published: March 28, 2025Last modified: March 28, 2025

Description

In the Linux kernel, the following vulnerability has been resolved: mm: multi-gen LRU: fix crash during cgroup migration lru_gen_migrate_mm() assumes lru_gen_add_mm() runs prior to itself. This isn't true for the following scenario: CPU 1 CPU 2 clone() cgroup_can_fork() cgroup_procs_write() cgroup_post_fork() task_lock() lru_gen_migrate_mm() task_unlock() task_lock() lru_gen_add_mm() task_unlock() And when the above happens, kernel crashes because of linked list corruption (mm_struct->lru_gen.list).

Status

References

• https://git.kernel.org/stable/c/04448022311cebd30969d3aebdde765f1258b360
• https://git.kernel.org/stable/c/de08eaa6156405f2e9369f06ba5afae0e4ab3b62