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Ubuntu: USN-2908-4: Linux kernel regression

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Ubuntu: USN-2908-4: Linux kernel regression

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/26/2016
Created
07/25/2018
Added
02/26/2016
Modified
07/09/2020

Description

USN-2908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 15.10. An incorrect locking fix caused a regression that broke graphics displays for Ubuntu 15.10 guests running within VMWare virtual machines. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

halfdog discovered that OverlayFS, when mounting on top of a FUSE mount, incorrectly propagated file attributes, including setuid. A local unprivileged attacker could use this to gain privileges. (CVE-2016-1576) halfdog discovered that OverlayFS in the Linux kernel incorrectly propagated security sensitive extended attributes, such as POSIX ACLs. A local unprivileged attacker could use this to gain privileges. (CVE-2016-1575) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) It was discovered that the Linux kernel's Filesystem in Userspace (FUSE) implementation did not handle initial zero length segments properly. A local attacker could use this to cause a denial of service (unkillable task). (CVE-2015-8785) Andy Lutomirski discovered a race condition in the Linux kernel's translation lookaside buffer (TLB) handling of flush events. A local attacker could use this to cause a denial of service or possibly leak sensitive information. (CVE-2016-2069)

Solution(s)

  • ubuntu-upgrade-linux-image-4-2-0-30-generic
  • ubuntu-upgrade-linux-image-4-2-0-30-generic-lpae
  • ubuntu-upgrade-linux-image-4-2-0-30-lowlatency
  • ubuntu-upgrade-linux-image-4-2-0-30-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-2-0-30-powerpc-smp
  • ubuntu-upgrade-linux-image-4-2-0-30-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-2-0-30-powerpc64-smp

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