This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============4888572192764370134==
Content-Type: multipart/signed; micalg=pgp-sha512;
 protocol="application/pgp-signature";
 boundary="utaXFduWM8sSo7AaGhD45vPN7IBdibU6C"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--utaXFduWM8sSo7AaGhD45vPN7IBdibU6C
Content-Type: text/plain; charset=utf-
Content-Transfer-Encoding: quoted-printable

==========================================================================
Ubuntu Security Notice USN-2691-1
July 28, 2015

linux vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Andy Lutomirski discovered a flaw in the Linux kernel's handling of nested
NMIs (non-maskable interrupts). An unprivileged local user could exploit
this flaw to cause a denial of service (system crash) or potentially
escalate their privileges. (CVE-2015-3290)

Colin King discovered a flaw in the add_key function of the Linux kernel's
keyring subsystem. A local user could exploit this flaw to cause a denial
of service (memory exhaustion). (CVE-2015-1333)

Andy Lutomirski discovered a flaw that allows user to cause the Linux
kernel to ignore some NMIs (non-maskable interrupts). A local unprivileged
user could exploit this flaw to potentially cause the system to miss
important NMIs resulting in unspecified effects. (CVE-2015-3291)

Andy Lutomirski and Petr Matousek discovered that an NMI (non-maskable
interrupt) that interrupts userspace and encounters an IRET fault is
incorrectly handled by the Linux kernel. An unprivileged local user could
exploit this flaw to cause a denial of service (kernel OOPs), corruption,
or potentially escalate privileges on the system. (CVE-2015-5157)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 15.04:
  linux-image-3.19.0-25-generic   3.19.0-25.26
  linux-image-3.19.0-25-generic-lpae  3.19.0-25.26
  linux-image-3.19.0-25-lowlatency  3.19.0-25.26
  linux-image-3.19.0-25-powerpc-e500mc  3.19.0-25.26
  linux-image-3.19.0-25-powerpc-smp  3.19.0-25.26
  linux-image-3.19.0-25-powerpc64-emb  3.19.0-25.26
  linux-image-3.19.0-25-powerpc64-smp  3.19.0-25.26

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
  http://www.ubuntu.com/usn/usn-2691-1
  CVE-2015-1333, CVE-2015-3290, CVE-2015-3291, CVE-2015-5157

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.19.0-25.26



--utaXFduWM8sSo7AaGhD45vPN7IBdibU6C
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=Spy7
-----END PGP SIGNATURE-----

--utaXFduWM8sSo7AaGhD45vPN7IBdibU6C--


--===============4888572192764370134==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

-- 
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce

--===============4888572192764370134==--