CVE-2024-43888 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mm: list_lru: fix UAF for memory cgroup

The mem_cgroup_from_slab_obj() is supposed to be called under rcu lock or cgroup_mutex or others which could prevent returned memcg from being freed. Fix it by adding missing rcu read lock.

Found by code inspection.

[songmuchun@bytedance.com: only grab rcu lock when necessary per Vlastimil] Link: https://lkml.kernel.org/r/20240801024603.1865-1-songmuchun@bytedance.com

Reference

https://git.kernel.org/stable/c/4589f77c18dd98b65f45617b6d1e95313cf6fcab https://git.kernel.org/stable/c/5161b48712dcd08ec427c450399d4d1483e21dea