udisks is an abstraction for enumerating block devices and performing operations on them.
A stack-based buffer overflow can be triggered when udisks is given a long path name as a mount point.
A local attacker could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition.
There is no known workaround at this time.
All udisks 1.0 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-fs/udisks-1.0.5:0"
All udisks 2.0 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-fs/udisks-2.1.3"