[Ksplice][Ubuntu-15.10-Updates] New updates available via Ksplice (USN-2843-1)

[Oracle Ksplice]

Synopsis: USN-2843-1 can now be patched using Ksplice
CVEs: CVE-2015-7799 CVE-2015-7872 CVE-2015-8104

Systems running Ubuntu 15.10 Wily can now use Ksplice to patch against
the latest Ubuntu Security Notice, USN-2843-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on Ubuntu 15.10 Wily
install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2015-8104: KVM host denial-of-service in debug exception.

A guest could cause a denial-of-service on a KVM host by triggering a
debug exception to fire during an existing debug exception.  This could
cause the host to get trapped in an infinite loop causing a
denial-of-service.  A privileged user in a guest could use this flaw to
crash the host.


* Information leak in Digi Neo and Classic PCI driver.

Missing initialization of on-stack structures could result in an
information leak of 16 bytes to user-space.


* CVE-2015-7872: Denial-of-service when garbage collecting uninstantiated keyring.

A logic error in the security keyring subsystem leads to a kernel crash
when garbage collecting a un-instantiated keyring.  A local, un-privileged
user can use this flaw to cause a denial-of-service.


* Denial-of-service in ISDN PPP device opening.

Missing allocation failure checks could result in a NULL pointer
dereference when opening an ISDN PPP device.  A local user with access
to the device could use this flaw to crash the system.


* CVE-2015-7799: Denial-of-service in PPP compression slot parameters.

Missing validation of VJ compression slot parameters for a PPP device
could result in a NULL pointer dereference and kernel crash.  A local
user with access to the PPP device could use this flaw to crash the
system.


* Information leak in Virtual Video Test Driver ioctl.

Missing initialization of an ioctl() structure field could result in a
leak of 16 bytes of kernel stack contents to user-space.


* Kernel crash in IOAPIC programming of legacy IRQs.

Missing locking could result in a kernel crash if an interrupt arrived
during programming of the IOAPIC.  This could cause a kernel crash
during booting of a Hyper-V guest.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.