CWE
416
Advisory Published

USN-2947-1: Linux kernel vulnerabilities

First published: Wed Apr 06 2016(Updated: )

Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly validate the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7833) Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2015-8812) Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. (CVE-2016-2085) It was discovered that the extended Berkeley Packet Filter (eBPF) implementation in the Linux kernel did not correctly compute branch offsets for backward jumps after ctx expansion. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-2383) David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2550) It was discovered that the Linux kernel did not enforce limits on the amount of data allocated to buffer pipes. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.2.0-35-generic<4.2.0-35.40
4.2.0-35.40
=15.10
All of
ubuntu/linux-image-4.2.0-35-generic-lpae<4.2.0-35.40
4.2.0-35.40
=15.10
All of
ubuntu/linux-image-4.2.0-35-lowlatency<4.2.0-35.40
4.2.0-35.40
=15.10
All of
ubuntu/linux-image-4.2.0-35-powerpc-e500mc<4.2.0-35.40
4.2.0-35.40
=15.10
All of
ubuntu/linux-image-4.2.0-35-powerpc-smp<4.2.0-35.40
4.2.0-35.40
=15.10
All of
ubuntu/linux-image-4.2.0-35-powerpc64-emb<4.2.0-35.40
4.2.0-35.40
=15.10
All of
ubuntu/linux-image-4.2.0-35-powerpc64-smp<4.2.0-35.40
4.2.0-35.40
=15.10

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2015-7833?

    The severity of CVE-2015-7833 is high.

  • How can an attacker exploit CVE-2015-7833?

    An attacker with physical access can exploit CVE-2015-7833 by causing a denial of service (system crash).

  • Which versions of Ubuntu are affected by CVE-2015-7833?

    Ubuntu 15.10 with Linux kernel version 4.2.0-35.40 is affected by CVE-2015-7833.

  • How can I fix the vulnerability CVE-2015-7833?

    To fix the vulnerability CVE-2015-7833, update the Linux kernel to version 4.2.0-35.40 or higher.

  • Where can I find more information about CVE-2015-7833?

    More information about CVE-2015-7833 can be found at the following link: [CVE-2015-7833](https://ubuntu.com/security/CVE-2015-7833).

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