The IPv4 implementation in the Linux kernel before 3.18.8 does not properly consider the length of the Read-Copy Update (RCU) grace period for redirecting lookups in the absence of caching, which allows remote attackers to cause a denial of service (memory consumption or system crash) via a flood of packets.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-1465
• torvalds/linux@df4d925
• https://bugzilla.redhat.com/show_bug.cgi?id=1183744
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=df4d92549f23e1c037e83323aff58a21b3de7fe0
• http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.8
• http://www.openwall.com/lists/oss-security/2015/02/03/13
• http://www.securityfocus.com/bid/72435
• http://www.securitytracker.com/id/1036763
• http://www.ubuntu.com/usn/USN-2545-1
• http://www.ubuntu.com/usn/USN-2546-1
• http://www.ubuntu.com/usn/USN-2562-1
• http://www.ubuntu.com/usn/USN-2563-1