client/mount.cifs.c in mount.cifs in smbfs in Samba 3.4.5 and earlier does not verify that the (1) device name and (2) mountpoint strings are composed of valid characters, which allows local users to cause a denial of service (mtab corruption) via a crafted string.
lists.opensuse.org/opensuse-security-announce/2010-04/msg00001.html
lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
secunia.com/advisories/39317
security.gentoo.org/glsa/glsa-201206-29.xml
www.mandriva.com/security/advisories?name=MDVSA-2010:090
www.securityfocus.com/bid/38326
www.vupen.com/english/advisories/2010/1062
git.samba.org/?p=samba.git%3Ba=commit%3Bh=a065c177dfc8f968775593ba00dffafeebb2e054