CWE
416 362
Advisory Published

USN-2889-1: Linux kernel vulnerabilities

First published: Tue Feb 02 2016(Updated: )

It was discovered that a use-after-free vulnerability existed in the AF_UNIX implementation in the Linux kernel. A local attacker could use crafted epoll_ctl calls to cause a denial of service (system crash) or expose sensitive information. (CVE-2013-7446) It was discovered that the KVM implementation in the Linux kernel did not properly restore the values of the Programmable Interrupt Timer (PIT). A user-assisted attacker in a KVM guest could cause a denial of service in the host (system crash). (CVE-2015-7513) Sasha Levin discovered that the Reliable Datagram Sockets (RDS) implementation in the Linux kernel had a race condition when checking whether a socket was bound or not. A local attacker could use this to cause a denial of service (system crash). (CVE-2015-7990) It was discovered that the Btrfs implementation in the Linux kernel incorrectly handled compressed inline extants on truncation. A local attacker could use this to expose sensitive information. (CVE-2015-8374) It was discovered that the netfilter Network Address Translation (NAT) implementation did not ensure that data structures were initialized when handling IPv4 addresses. An attacker could use this to cause a denial of service (system crash). (CVE-2015-8787)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-3.19.0-49-powerpc-smp<3.19.0-49.55
3.19.0-49.55
=15.04
All of
ubuntu/linux-image-3.19.0-49-powerpc-e500mc<3.19.0-49.55
3.19.0-49.55
=15.04
All of
ubuntu/linux-image-3.19.0-49-lowlatency<3.19.0-49.55
3.19.0-49.55
=15.04
All of
ubuntu/linux-image-3.19.0-49-generic-lpae<3.19.0-49.55
3.19.0-49.55
=15.04
All of
ubuntu/linux-image-3.19.0-49-powerpc64-emb<3.19.0-49.55
3.19.0-49.55
=15.04
All of
ubuntu/linux-image-3.19.0-49-generic<3.19.0-49.55
3.19.0-49.55
=15.04
All of
ubuntu/linux-image-3.19.0-49-powerpc64-smp<3.19.0-49.55
3.19.0-49.55
=15.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-2889-1?

    The severity of USN-2889-1 is high.

  • How do I fix USN-2889-1?

    To fix USN-2889-1, update your Linux kernel to version 3.19.0-49.55 or later.

  • What is the vulnerability ID for the use-after-free vulnerability in the AF_UNIX implementation?

    The vulnerability ID for the use-after-free vulnerability in the AF_UNIX implementation is CVE-2013-7446.

  • What is the vulnerability ID for the KVM implementation vulnerability?

    The vulnerability ID for the KVM implementation vulnerability is CVE-2015-7513.

  • What is the vulnerability ID for the SCSI implementation vulnerability?

    The vulnerability ID for the SCSI implementation vulnerability is CVE-2015-7990.

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