The __nfs4_proc_set_acl function in fs/nfs/nfs4proc.c in the Linux kernel before 2.6.38 stores NFSv4 ACL data in memory that is allocated by kmalloc but not properly freed, which allows local users to cause a denial of service (panic) via a crafted attempt to set an ACL.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e9e3d724e2145f5039b423c290ce2b2c3d8f94bc
lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
openwall.com/lists/oss-security/2011/03/07/12
openwall.com/lists/oss-security/2011/03/07/2
secunia.com/advisories/46397
securitytracker.com/id?1025336
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38
www.securityfocus.com/archive/1/520102/100/0/threaded
www.vmware.com/security/advisories/VMSA-2011-0012.html
bugzilla.redhat.com/show_bug.cgi?id=682641