CWE
476
Advisory Published

USN-2777-1: Linux kernel (Utopic HWE) vulnerabilities

First published: Tue Oct 20 2015(Updated: )

It was discovered that virtio networking in the Linux kernel did not handle fragments correctly, leading to kernel memory corruption. A remote attacker could use this to cause a denial of service (system crash) or possibly execute code with administrative privileges. (CVE-2015-5156) Benjamin Randazzo discovered an information leak in the md (multiple device) driver when the bitmap_info.file is disabled. A local privileged attacker could use this to obtain sensitive information from the kernel. (CVE-2015-5697) Marc-André Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). (CVE-2015-6252) It was discovered that the Reliable Datagram Sockets (RDS) implementation in the Linux kernel did not verify sockets were properly bound before attempting to send a message, which could cause a NULL pointer dereference. An attacker could use this to cause a denial of service (system crash). (CVE-2015-6937) Ben Hutchings discovered that the Advanced Union Filesystem (aufs) for the Linux kernel did not correctly handle references of memory mapped files from an aufs mount. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2015-7312)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-3.16.0-51-generic<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04
All of
ubuntu/linux-image-3.16.0-51-generic-lpae<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04
All of
ubuntu/linux-image-3.16.0-51-lowlatency<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04
All of
ubuntu/linux-image-3.16.0-51-powerpc-e500mc<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04
All of
ubuntu/linux-image-3.16.0-51-powerpc-smp<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04
All of
ubuntu/linux-image-3.16.0-51-powerpc64-emb<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04
All of
ubuntu/linux-image-3.16.0-51-powerpc64-smp<3.16.0-51.69~14.04.1
3.16.0-51.69~14.04.1
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2015-5156?

    The severity of CVE-2015-5156 is high.

  • How do I fix the Linux kernel vulnerability (Utopic HWE)?

    To fix the Linux kernel vulnerability (Utopic HWE), you should update to version 3.16.0-51.69~14.04.1 or later.

  • Is Ubuntu 14.04 affected by CVE-2015-5156?

    Yes, Ubuntu 14.04 is affected by CVE-2015-5156.

  • Where can I find more information about CVE-2015-5156?

    You can find more information about CVE-2015-5156 on the Ubuntu Security website.

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