The pppol2tp_recvmsg function in drivers/net/pppol2tp.c in the Linux kernel 2.6 before 2.6.26-rc6 allows remote attackers to cause a denial of service (kernel heap memory corruption and system crash) and possibly have unspecified other impact via a crafted PPPOL2TP packet that results in a large value for a certain length variable.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6b6707a50c7598a83820077393f8823ab791abf8
kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.26-rc6
lists.opensuse.org/opensuse-security-announce/2008-07/msg00009.html
secunia.com/advisories/30719
secunia.com/advisories/30901
secunia.com/advisories/30920
secunia.com/advisories/31107
secunia.com/advisories/31202
securitytracker.com/id?1020297
wiki.rpath.com/wiki/Advisories:rPSA-2008-0207
www.mandriva.com/security/advisories?name=MDVSA-2008:167
www.openwall.com/lists/oss-security/2008/06/19/3
www.securityfocus.com/bid/29747
www.ubuntu.com/usn/usn-625-1
www.vupen.com/english/advisories/2008/1854
exchange.xforce.ibmcloud.com/vulnerabilities/43111
issues.rpath.com/browse/RPL-2629
www.redhat.com/archives/fedora-package-announce/2008-July/msg00082.html