Debian: DSA-1381-1 Critical: Local DoS And Code Execution Risks

The NT bit maybe leaked into the next task which can local attackers
to cause a Denial of Service (crash) on systems which run the 'amd64'
flavour kernel. The stable distribution ('etch') was not believed to
be vulnerable to this issue at the time of release, however Bastian
Blank discovered that this issue still applied to the 'xen-amd64' and
'xen-vserver-amd64' flavours, and is resolved by this DSA.

CVE-2007-4133

Hugh Dickins discovered a potential local DoS (panic) in hugetlbfs.
A misconversion of hugetlb_vmtruncate_list to prio_tree may allow
local users to trigger a BUG_ON() call in exit_mmap.

CVE-2007-4573

Wojciech Purczynski discovered a vulnerability that can be exploited
by a local user to obtain superuser privileges on x86_64 systems.
This resulted from improper clearing of the high bits of registers
during ia32 system call emulation. This vulnerability is relevant
to the Debian amd64 port as well as users of the...