There is a null-pointer-dereference flaw found in f2fs_write_end_io in fs/f2fs/data.c in the Linux kernel. This flaw allows a local privileged user to cause a denial of service problem.
https://www.debian.org/security/2023/dsa-5492
https://www.debian.org/security/2023/dsa-5480
https://security.netapp.com/advisory/ntap-20230929-0002/
https://lore.kernel.org/linux-f2fs-devel/20230522124203.3838360-1-chao%40kernel.org/
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html