CVE-2023-52939 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mm: memcg: fix NULL pointer in mem_cgroup_track_foreign_dirty_slowpath()

As commit 18365225f044 (\hwpoison memcg: forcibly uncharge LRU pages) hwpoison will forcibly uncharg a LRU hwpoisoned page the folio_memcg could be NULl then mem_cgroup_track_foreign_dirty_slowpath() could occurs a NULL pointer dereference let’s do not record the foreign writebacks for folio memcg is null in mem_cgroup_track_foreign_dirty() to fix it.

Reference

https://git.kernel.org/stable/c/ac86f547ca1002aec2ef66b9e64d03f45bbbfbb9 https://git.kernel.org/stable/c/b79ba5953f6fdc5559389ad415620bffc24f024b