The utimensat system call (sys_utimensat) in Linux kernel 2.6.22 and other versions before 2.6.25.3 does not check file permissions when certain UTIME_NOW and UTIME_OMIT combinations are used, which allows local users to modify file times of arbitrary files, possibly leading to a denial of service.
https://exchange.xforce.ibmcloud.com/vulnerabilities/42342
http://www.vupen.com/english/advisories/2008/1543/references
http://www.ubuntu.com/usn/usn-625-1
http://www.securityfocus.com/bid/29134
http://www.redhat.com/support/errata/RHSA-2008-0585.html
http://www.mandriva.com/security/advisories?name=MDVSA-2008:167
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0169
http://secunia.com/advisories/31628
http://secunia.com/advisories/31107
http://secunia.com/advisories/30818
http://secunia.com/advisories/30241
http://secunia.com/advisories/30198
http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00006.html