Advisory Published

USN-3443-1: Linux kernel vulnerabilities

First published: Tue Oct 10 2017(Updated: )

It was discovered that on the PowerPC architecture, the kernel did not properly sanitize the signal stack when handling sigreturn(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-1000255) Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-14106)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-powerpc-smp<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-powerpc-e500mc<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-4.10.0-37-lowlatency<4.10.0-37.41
4.10.0-37.41
=17.04
All of
ubuntu/linux-image-generic-lpae<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-lowlatency<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-virtual<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-4.10.0-1019-raspi2<4.10.0-1019.22
4.10.0-1019.22
=17.04
All of
ubuntu/linux-image-powerpc64-smp<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-generic<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-4.10.0-37-generic-lpae<4.10.0-37.41
4.10.0-37.41
=17.04
All of
ubuntu/linux-image-4.10.0-37-generic<4.10.0-37.41
4.10.0-37.41
=17.04
All of
ubuntu/linux-image-powerpc64-emb<4.10.0.37.37
4.10.0.37.37
=17.04
All of
ubuntu/linux-image-raspi2<4.10.0.1019.20
4.10.0.1019.20
=17.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this security notice?

    The vulnerability ID for this security notice is CVE-2017-1000255.

  • What is the severity of CVE-2017-1000255?

    The severity of CVE-2017-1000255 is high.

  • Which systems are affected by CVE-2017-1000255?

    PowerPC architectures running Ubuntu 17.04 are affected by CVE-2017-1000255.

  • What can an attacker do with CVE-2017-1000255?

    An attacker can cause a denial of service (system crash) or possibly execute arbitrary code.

  • How can I fix CVE-2017-1000255?

    To fix CVE-2017-1000255, update the affected systems to kernel version 4.10.0.37.37 or higher.

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