1. Ubuntu Security Notices
  2. USN-2667-1

USN-2667-1: Linux kernel vulnerabilities

Publication date

7 July 2015

Overview

Several security issues were fixed in the kernel.

Releases

Packages

Details

A race condition was discovered in the Linux kernel's file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)

A underflow error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)

A bounds check error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)

A division by zero error was discovered in the Linux kernel's Ozmo...

A race condition was discovered in the Linux kernel's file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)

A underflow error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)

A bounds check error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)

A division by zero error was discovered in the Linux kernel's Ozmo Devices
USB over WiFi host controller driver. A remote attacker could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4003)

A double free flaw was discovered in the Linux kernel's path lookup. A
local user could cause a denial of service (Oops). (CVE-2015-5706)

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
15.04 vivid linux-image-3.19.0-22-generic –  3.19.0-22.22
linux-image-3.19.0-22-powerpc-e500mc –  3.19.0-22.22
linux-image-3.19.0-22-lowlatency –  3.19.0-22.22
linux-image-3.19.0-22-powerpc-smp –  3.19.0-22.22
linux-image-3.19.0-22-generic-lpae –  3.19.0-22.22
linux-image-3.19.0-22-powerpc64-smp –  3.19.0-22.22
linux-image-3.19.0-22-powerpc64-emb –  3.19.0-22.22

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References

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