Array index error in the rose_parse_national function in net/rose/rose_subr.c in the Linux kernel before 2.6.39 allows remote attackers to cause a denial of service (heap memory corruption) or possibly have unspecified other impact by composing FAC_NATIONAL_DIGIS data that specifies a large number of digipeaters, and then sending this data to a ROSE socket.
https://bugzilla.redhat.com/show_bug.cgi?id=770777
http://www.openwall.com/lists/oss-security/2011/04/05/19
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39