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Test your applicationsUpgrade RHEL:7
kernel-tools-libs
to version 0:3.10.0-123.13.1.el7 or higher.
This issue was patched in RHSA-2014:1971
.
Note: Versions mentioned in the description apply only to the upstream kernel-tools-libs
package and not the kernel-tools-libs
package as distributed by RHEL
.
See How to fix?
for RHEL:7
relevant fixed versions and status.
The mountpoint_last function in fs/namei.c in the Linux kernel before 3.15.8 does not properly maintain a certain reference count during attempts to use the umount system call in conjunction with a symlink, which allows local users to cause a denial of service (memory consumption or use-after-free) or possibly have unspecified other impact via the umount program.