Synopsis:    Important: kernel security, bug fix, and enhancement update
Issue Date:  2011-08-23
CVE Numbers: CVE-2011-1182
              CVE-2011-1576
              CVE-2011-1593
              CVE-2011-2492
              CVE-2011-1776
              CVE-2011-2491
              CVE-2011-2183
              CVE-2011-2213
              CVE-2011-1898
              CVE-2011-2497
              CVE-2011-2495
              CVE-2011-2517
              CVE-2011-2689
              CVE-2011-2695


Security issues:

* Using PCI passthrough without interrupt remapping support allowed KVM
guests to generate MSI interrupts and thus potentially inject traps. A
privileged guest user could use this flaw to crash the host or possibly
escalate their privileges on the host. The fix for this issue can
prevent PCI passthrough working and guests starting. (CVE-2011-1898,
Important)

* Flaw in the client-side NLM implementation could allow a local,
unprivileged user to cause a denial of service. (CVE-2011-2491, Important)

* Integer underflow in the Bluetooth implementation could allow a remote
attacker to cause a denial of service or escalate their privileges by
sending a specially-crafted request to a target system via Bluetooth.
(CVE-2011-2497, Important)

* Buffer overflows in the netlink-based wireless configuration interface
implementation could allow a local user, who has the CAP_NET_ADMIN
capability, to cause a denial of service or escalate their privileges on
systems that have an active wireless interface. (CVE-2011-2517, Important)

* Flaw in the way the maximum file offset was handled for ext4 file
systems could allow a local, unprivileged user to cause a denial of
service. (CVE-2011-2695, Important)

* Flaw allowed napi_reuse_skb() to be called on VLAN packets. An
attacker on the local network could use this flaw to send crafted
packets to a target, possibly causing a denial of service.
(CVE-2011-1576, Moderate)

* Integer signedness error in next_pidmap() could allow a local,
unprivileged user to cause a denial of service. (CVE-2011-1593, Moderate)

* Race condition in the memory merging support (KSM) could allow a 
local, unprivileged user to cause a denial of service. KSM is off by 
default, but on systems running VDSM, or on KVM hosts, it is likely 
turned on by the ksm/ksmtuned services. (CVE-2011-2183, Moderate)

* Flaw in inet_diag_bc_audit() could allow a local, unprivileged user to
cause a denial of service. (CVE-2011-2213, Moderate)

* Flaw in the way space was allocated in the Global File System 2 (GFS2)
implementation. If the file system was almost full, and a local,
unprivileged user made an fallocate() request, it could result in a 
denial of service. Setting quotas to prevent users from using all 
available disk space would prevent exploitation of this flaw. 
(CVE-2011-2689, Moderate)

* Local, unprivileged users could send signals via the sigqueueinfo 
system call, with si_code set to SI_TKILL and with spoofed process and 
user IDs, to other processes. This flaw does not allow existing 
permission checks to be bypassed; signals can only be sent if your 
privileges allow you to already do so. (CVE-2011-1182, Low)

* Heap overflow in the EFI GUID Partition Table (GPT) implementation 
could allow a local attacker to cause a denial of service by mounting a 
disk containing crafted partition tables. (CVE-2011-1776, Low)

* Structure padding in two structures in the Bluetooth implementation 
was not initialized properly before being copied to user-space, possibly
allowing local, unprivileged users to leak kernel stack memory to
user-space. (CVE-2011-2492, Low)

* /proc/[PID]/io is world-readable by default. Previously, these files
could be read without any further restrictions. A local, unprivileged 
user could read these files, belonging to other, possibly privileged 
processes to gather confidential information, such as the length of a 
password used in a process. (CVE-2011-2495, Low)

SL6:
   i386
      kernel-2.6.32-131.12.1.el6.i686.rpm
      kernel-devel-2.6.32-131.12.1.el6.i686.rpm
      kernel-debug-devel-2.6.32-131.12.1.el6.i686.rpm
      kernel-debug-2.6.32-131.12.1.el6.i686.rpm
      kernel-headers-2.6.32-131.12.1.el6.i686.rpm
      perf-2.6.32-131.12.1.el6.i686.rpm
   noarch
      kernel-firmware-2.6.32-131.12.1.el6.noarch.rpm
      kernel-doc-2.6.32-131.12.1.el6.noarch.rpm
   x86_64
      kernel-2.6.32-131.12.1.el6.x86_64.rpm
      kernel-devel-2.6.32-131.12.1.el6.x86_64.rpm
      kernel-debug-devel-2.6.32-131.12.1.el6.x86_64.rpm
      kernel-debug-2.6.32-131.12.1.el6.x86_64.rpm
      kernel-headers-2.6.32-131.12.1.el6.x86_64.rpm
      perf-2.6.32-131.12.1.el6.x86_64.rpm

- Scientific Linux Development Team