linux-2.6

Several local vulnerabilities have been discovered in the Linux kernel
that may lead to a denial of service or the execution of arbitrary
code. The Common Vulnerabilities and Exposures project identifies the
following problems:

• CVE-2006-5755
  The NT bit maybe leaked into the next task which can make it possible for 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 i386 port who run
  the amd64 linux-image flavour.

DSA-1378 resolved this problem for the amd64 flavour kernels, but
Tim Wickberg and Ralf Hemmenstädt reported an outstanding issue with
the xen-amd64 and xen-vserver-amd64 flavours that is resolved by
this DSA.

• CVE-2007-5093
  Alex Smith discovered an issue with the pwc driver for certain webcam
  devices. If the device is removed while a userspace application has it
  open, the driver will wait for userspace to close the device, resulting
  in a blocked USB subsystem. This issue is of low security impact as
  it requires the attacker to either have physical access to the system
  or to convince users with local access to remove the device on their
  behalf.

These problems have been fixed in the stable distribution in version
2.6.18.dfsg.1-13etch4.

This is an update to DSA-1381-1 which included only amd64 binaries for
linux-2.6. Builds for all other architectures are now available, as well as
rebuilds of ancillary packages that make use of the included linux source.

The following matrix lists additional packages that were rebuilt for
compatibility with or to take advantage of this update:

We recommend that you upgrade your kernel package immediately and reboot
the machine. If you have built a custom kernel from the kernel source
package, you will need to rebuild to take advantage of these fixes.