The Linux kernel before 2.6.25.10 does not properly perform tty operations, which allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving NULL pointer dereference of function pointers in (1) hamradio/6pack.c, (2) hamradio/mkiss.c, (3) irda/irtty-sir.c, (4) ppp_async.c, (5) ppp_synctty.c, (6) slip.c, (7) wan/x25_asy.c, and (8) wireless/strip.c in drivers/net/.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6633
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11632
https://exchange.xforce.ibmcloud.com/vulnerabilities/43687
http://www.securityfocus.com/bid/30076
http://www.openwall.com/lists/oss-security/2008/07/03/2
http://www.debian.org/security/2008/dsa-1630
http://support.avaya.com/elmodocs2/security/ASA-2008-365.htm
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00007.html