Issued:
2017-02-22
Updated:
2017-03-06

RHSA-2017:0295 - Important: kernel-rt security update

Synopsis

Important: kernel-rt security update

Type/Severity

Security Advisory Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

  • A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Real Time7x86_64
Red Hat Enterprise Linux for Real Time for x86_64 - Extended Life Cycle Support7x86_64
Red Hat Enterprise Linux for Real Time for NFV7x86_64

Updated Packages

  • kernel-rt-trace-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-3.10.0-514.6.1.rt56.430.el7.src.rpm
  • kernel-rt-debug-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-debug-kvm-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-trace-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-debug-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-debug-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-trace-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-514.6.1.rt56.430.el7.noarch.rpm

Fixes

CVEs

References

Additional information