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Ubuntu 12.10 USN-1699-2: Kernel Regression and Fix Instructions

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Calendar Grey February 1, 2013
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A flaw in the Linux kernel impacts Ubuntu 12.10 systems. Please upgrade your software to address vulnerabilities associated with USN-1699-1.
USN-1699-1 introduced a regression in the Linux kernel.

Summary

USN-1699-1 introduced a regression in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

USN-1699-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated

regression inotify/fanotify stopped working after upgrading. This update

fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual

machine) subsystem's handling of the XSAVE CPU feature. On hosts without the

XSAVE CPU feature, using qemu userspace, an unprivileged local attacker could

exploit this flaw to crash the system. (CVE-2012-4461)

A flaw was discovered in the Linux kernel's handling of script execution

when module loading is enabled. A local attacker could exploit this flaw to

cause a leak of kernel stack contents. (CVE-2012-4530)

Florian Weimer discovered that hypervkvpd, which is distributed in the

Linux kernel, was not correctly validating source add...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory update kernel fix ubuntu linux regression

Update Instructions

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

Ubuntu 12.10:
  linux-image-3.5.0-23-generic    3.5.0-23.35
  linux-image-3.5.0-23-highbank   3.5.0-23.35
  linux-image-3.5.0-23-omap       3.5.0-23.35
  linux-image-3.5.0-23-powerpc-smp  3.5.0-23.35
  linux-image-3.5.0-23-powerpc64-smp  3.5.0-23.35

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

Severity
important
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February 01, 2013

Topics%20covered

Topics Covered

security advisory update kernel fix ubuntu linux regression

Package Information

https://launchpad.net/ubuntu/+source/linux/3.5.0-23.35

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