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The copy_from_user function in the uaccess code in Linux kernel 2.6 before 2.6.19-rc1 when running on s390 does not properly clear a kernel buffer which allows local user space programs to read portions of kernel memory by "appending to a file from a bad address" which triggers a fault that prevents the unused memory from being cleared in the kernel buffer.

oval:org.mitre.oval:def:9885

The copy_from_user function in the uaccess code in Linux kernel 2.6 before 2.6.19-rc1 when running on s390 does not properly clear a kernel buffer which allows local user space programs to read portions of kernel memory by "appending to a file from a bad address" which triggers a fault that prevents the unused memory from being cleared in the kernel buffer.