The isdn_ioctl function in isdn_common.c in Linux kernel 2.6.23 allows local users to cause a denial of service via a crafted ioctl struct in which iocts is not null terminated, which triggers a buffer overflow.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10971
http://www.vupen.com/english/advisories/2008/2222/references
http://www.ubuntu.com/usn/usn-578-1
http://www.ubuntu.com/usn/usn-574-1
http://www.securityfocus.com/bid/27497
http://www.redhat.com/support/errata/RHSA-2008-0787.html
http://www.redhat.com/support/errata/RHSA-2008-0211.html
http://www.mandriva.com/security/advisories?name=MDVSA-2008:112
http://www.mandriva.com/security/advisories?name=MDVSA-2008:086
http://www.debian.org/security/2008/dsa-1504
http://www.debian.org/security/2008/dsa-1503
http://www.debian.org/security/2008/dsa-1479
http://secunia.com/advisories/33280
http://secunia.com/advisories/31246
http://secunia.com/advisories/30962
http://secunia.com/advisories/30110
http://secunia.com/advisories/29570
http://secunia.com/advisories/29058
http://secunia.com/advisories/28971
http://secunia.com/advisories/28889
http://secunia.com/advisories/28748
http://secunia.com/advisories/28706
http://secunia.com/advisories/28626
http://rhn.redhat.com/errata/RHSA-2008-0055.html
http://lists.vmware.com/pipermail/security-announce/2008/000023.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2008-02/msg00005.html