The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.21 through 2.6.23.7, and 2.6.24-rc through 2.6.24-rc2, allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.
https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00302.html
https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00170.html
https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00032.html
https://issues.rpath.com/browse/RPL-1965
https://exchange.xforce.ibmcloud.com/vulnerabilities/38548
http://www.vupen.com/english/advisories/2007/3902
http://www.ubuntu.com/usn/usn-574-1
http://www.ubuntu.com/usn/usn-558-1
http://www.securityfocus.com/bid/26474
http://www.novell.com/linux/security/advisories/2007_63_kernel.html
http://www.mandriva.com/security/advisories?name=MDVSA-2008:044
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.24-rc3
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.8
http://secunia.com/advisories/29245
http://secunia.com/advisories/28706
http://secunia.com/advisories/28170
http://secunia.com/advisories/27922
http://secunia.com/advisories/27919
http://secunia.com/advisories/27888
http://secunia.com/advisories/27703
http://secunia.com/advisories/27664
http://lwn.net/Articles/258947/
http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00002.html