VULNERABILITY

Ubuntu: USN-3522-4: Linux kernel (Xenial HWE) regression

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Ubuntu: USN-3522-4: Linux kernel (Xenial HWE) regression

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:C/I:N/A:N)
Published
01/10/2018
Created
07/25/2018
Added
01/11/2018
Modified
02/19/2025

Description

USN-3522-2 fixed a vulnerability in the Linux Hardware Enablement kernel for Ubuntu 14.04 LTS to address Meltdown (CVE-2017-5754). Unfortunately, that update introduced a regression where a few systems failed to boot successfully. This update fixes the problem.

We apologize for the inconvenience.

Original advisory 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.

Solution(s)

  • ubuntu-upgrade-linux-image-4-4-0-109-generic
  • ubuntu-upgrade-linux-image-4-4-0-109-lowlatency
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial

References

  • USN-3522-2
  • USN-3522-4

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