kernel is vulnerable to arbitrary code execution. The vulnerability exists as a flaw was found in the Linux kernel Network File System daemon (nfsd) when NFSv4 was enabled. Remote attackers could use this to cause a denial of service via a buffer overflow.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=91b80969ba466ba4b915a4a1d03add8c297add3f
lkml.org/lkml/2008/9/3/286
secunia.com/advisories/31881
secunia.com/advisories/32190
secunia.com/advisories/32393
www.debian.org/security/2008/dsa-1636
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26.4
www.openwall.com/lists/oss-security/2008/09/04/18
www.openwall.com/lists/oss-security/2008/09/04/4
www.redhat.com/security/updates/classification/#important
www.redhat.com/support/errata/RHSA-2008-0857.html
www.securityfocus.com/bid/31133
www.ubuntu.com/usn/usn-659-1
access.redhat.com/errata/RHSA-2008:0857
bugzilla.redhat.com/show_bug.cgi?id=461101
exchange.xforce.ibmcloud.com/vulnerabilities/45055