The ext4_decode_error function in fs/ext4/super.c in the ext4 filesystem in the Linux kernel before 2.6.32 allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference), and possibly have unspecified other impact, via a crafted read-only filesystem that lacks a journal.
Exploitability
AV:NAC:MAu:NImpact
C:NI:NA:C7.1/AV:N/AC:M/Au:N/C:N/I:N/A:C