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USN-3524-1: Linux kernel vulnerability

9 January 2018

Several security issues were fixed in the Linux kernel.

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Releases

Packages

Details

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 14.04

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

Related notices

  • USN-3541-2: linux-hwe, linux-image-4.13.0-31-generic, linux-image-4.13.0-1007-gcp, linux-oem, linux-image-4.13.0-1017-oem, linux-image-4.13.0-31-lowlatency, linux-azure, linux-gcp, linux-image-4.13.0-31-generic-lpae, linux-image-extra-4.13.0-1006-azure, linux-image-extra-4.13.0-1007-gcp, linux-image-4.13.0-1006-azure, linux-image-extra-4.13.0-31-generic
  • USN-3523-2: linux-hwe, linux-image-4.13.0-26-generic, linux-image-4.13.0-26-generic-lpae, linux-image-4.13.0-1006-gcp, linux-oem, linux-image-4.13.0-1005-azure, linux-azure, linux-gcp, linux-image-extra-4.13.0-26-generic, linux-image-4.13.0-1015-oem, linux-image-extra-4.13.0-1005-azure, linux-image-4.13.0-26-lowlatency, linux-image-extra-4.13.0-1006-gcp
  • USN-3540-1: linux-euclid, linux-image-4.4.0-112-powerpc-e500mc, linux-image-4.4.0-112-powerpc-smp, linux-image-4.4.0-9023-euclid, linux-image-4.4.0-112-generic, linux-aws, linux-image-4.4.0-112-powerpc64-emb, linux-image-4.4.0-112-powerpc64-smp, linux-image-extra-4.4.0-112-generic, linux, linux-image-4.4.0-112-generic-lpae, linux-image-4.4.0-1049-aws, linux-image-4.4.0-112-lowlatency, linux-image-extra-4.4.0-9023-euclid
  • USN-3540-2: linux-lts-xenial, linux-image-4.4.0-111-powerpc64-emb, linux-image-extra-4.4.0-111-generic, linux-image-4.4.0-111-generic, linux-aws, linux-image-4.4.0-111-generic-lpae, linux-image-4.4.0-111-lowlatency, linux-image-4.4.0-111-powerpc-e500mc, linux-image-4.4.0-111-powerpc64-smp, linux-image-4.4.0-1011-aws, linux-image-4.4.0-111-powerpc-smp
  • USN-3522-1: linux-euclid, linux-image-extra-4.4.0-9021-euclid, linux-kvm, linux-image-4.4.0-1015-kvm, linux-image-4.4.0-108-lowlatency, linux-image-4.4.0-108-powerpc-e500mc, linux-aws, linux-image-4.4.0-108-powerpc64-emb, linux, linux-image-4.4.0-9021-euclid, linux-image-4.4.0-108-powerpc-smp, linux-image-extra-4.4.0-108-generic, linux-image-4.4.0-108-generic, linux-image-4.4.0-108-powerpc64-smp, linux-image-4.4.0-1047-aws, linux-image-4.4.0-108-generic-lpae
  • USN-3522-2: linux-lts-xenial, linux-image-4.4.0-1009-aws, linux-image-4.4.0-108-lowlatency, linux-image-4.4.0-108-powerpc-e500mc, linux-aws, linux-image-4.4.0-108-powerpc64-emb, linux-image-4.4.0-108-powerpc-smp, linux-image-4.4.0-108-generic, linux-image-4.4.0-108-powerpc64-smp, linux-image-extra-4.4.0-108-generic, linux-image-4.4.0-108-generic-lpae
  • USN-3524-2: linux-image-3.13.0-139-generic-lpae, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-139-generic
  • USN-3597-2: linux-image-4.13.0-37-lowlatency, linux-hwe, linux-image-extra-4.13.0-37-generic, linux-image-4.13.0-37-generic-lpae, linux-image-4.13.0-37-generic
  • USN-3516-1: firefox-locale-ja, firefox-locale-as, firefox-dev, firefox-locale-sv, firefox-locale-csb, firefox-locale-bg, firefox-locale-xh, firefox-locale-nn, firefox-locale-zh-hans, firefox-locale-eu, firefox-locale-ast, firefox-locale-km, firefox-locale-fi, firefox-locale-vi, firefox-locale-an, firefox-locale-gl, firefox-locale-mn, firefox-locale-be, firefox-locale-en, firefox-locale-el, firefox-locale-zh-hant, firefox-locale-bn, firefox-locale-gd, firefox-locale-he, firefox-locale-nb, firefox-locale-mr, firefox-locale-eo, firefox-locale-kk, firefox-locale-sl, firefox-locale-or, firefox-locale-pa, firefox-locale-uz, firefox-locale-hy, firefox-locale-ku, firefox-locale-sr, firefox-locale-te, firefox-locale-cak, firefox-locale-ar, firefox-locale-gu, firefox-locale-kab, firefox-locale-is, firefox-globalmenu, firefox-locale-af, firefox-locale-nl, firefox-locale-es, firefox-locale-kn, firefox-locale-hsb, firefox-locale-hr, firefox-locale-ms, firefox-locale-si, firefox-locale-ml, firefox-locale-de, firefox-locale-zu, firefox-locale-lt, firefox-locale-fa, firefox-locale-my, firefox-locale-tr, firefox-locale-hi, firefox-locale-it, firefox-locale-ka, firefox-locale-cs, firefox-locale-fy, firefox-locale-pl, firefox-locale-br, firefox-locale-nso, firefox, firefox-locale-et, firefox-locale-th, firefox-locale-bs, firefox-locale-ro, firefox-locale-lv, firefox-locale-sq, firefox-testsuite, firefox-locale-ru, firefox-locale-ur, firefox-locale-mai, firefox-locale-fr, firefox-locale-ko, firefox-locale-da, firefox-locale-ca, firefox-locale-oc, firefox-locale-hu, firefox-mozsymbols, firefox-locale-cy, firefox-locale-pt, firefox-locale-sw, firefox-locale-ga, firefox-locale-sk, firefox-locale-uk, firefox-locale-mk, firefox-locale-gn, firefox-locale-lg, firefox-locale-az, firefox-locale-id, firefox-locale-ta
  • USN-3541-1: linux-image-4.13.0-31-generic, linux-image-lowlatency, linux-image-4.13.0-31-lowlatency, linux, linux-image-generic
  • USN-3597-1: linux-image-4.13.0-37-lowlatency, linux-image-4.13.0-1015-raspi2, linux-image-generic-lpae, linux-image-lowlatency, linux, linux-raspi2, linux-image-generic, linux-image-4.13.0-37-generic-lpae, linux-image-4.13.0-37-generic, linux-image-raspi2
  • USN-3523-1: linux-image-4.13.0-25-lowlatency, linux-image-lowlatency, linux, linux-image-generic, linux-image-4.13.0-25-generic
  • USN-3525-1: linux-image-3.2.0-132-generic-pae, linux-image-3.2.0-132-generic, linux, linux-image-generic-pae, linux-image-generic
  • USN-3583-1: linux-image-3.13.0-142-powerpc64-emb, linux-image-3.13.0-142-powerpc64-smp, linux-image-3.13.0-142-powerpc-e500mc, linux-image-3.13.0-142-generic, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-powerpc-smp, linux-image-3.13.0-142-powerpc-e500, linux-image-3.13.0-142-lowlatency, linux, linux-image-extra-3.13.0-142-generic

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