A NULL pointer dereference flaw was found in dbFree in fs/jfs/jfs_dmap.c in the journaling file system (JFS) in the Linux Kernel. This issue may allow a local attacker to crash the system due to a missing sanity check.
https://github.com/torvalds/linux/commit/0d4837fdb796f99369cf7691d33de1b856bcaf1f