USN-1594-1: Linux kernel (Oneiric backport) vulnerabilities

Ubuntu Security Notice USN-1594-1

3rd October, 2012

linux-lts-backport-oneiric vulnerabilities

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

  • Ubuntu 10.04 LTS


Several security issues were fixed in the kernel.

Software description

  • linux-lts-backport-oneiric - Linux kernel backport from Oneiric


Vadim Ponomarev discovered a flaw in the Linux kernel causing a reference
leak when PID namespaces are used. A remote attacker could exploit this
flaw causing a denial of service. (CVE-2012-2127)

A flaw was found in how the Linux kernel's KVM (Kernel-based Virtual
Machine) subsystem handled MSI (Message Signaled Interrupts). A local
unprivileged user could exploit this flaw to cause a denial of service or
potentially elevate privileges. (CVE-2012-2137)

Mathias Krause discover an error in Linux kernel's Datagram Congestion
Control Protocol (DCCP) Congestion Control Identifier (CCID) use. A local
attack could exploit this flaw to cause a denial of service (crash) and
potentially escalate privileges if the user can mmap page 0.

Update instructions

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

Ubuntu 10.04 LTS:
linux-image-3.0.0-26-server 3.0.0-26.43~lucid1
linux-image-3.0.0-26-generic 3.0.0-26.43~lucid1
linux-image-3.0.0-26-virtual 3.0.0-26.43~lucid1
linux-image-3.0.0-26-generic-pae 3.0.0-26.43~lucid1

To update your system, please follow these instructions:

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


CVE-2012-2127, CVE-2012-2137, CVE-2013-1827