Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory: Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise MRG 2.

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):

• Kernel: page cache side channel attacks (CVE-2019-5489)
• kernel: Handling of might_cancel queueing is not properly pretected against race (CVE-2017-10661)
• kernel: Inifinite loop vulnerability in mm/madvise.c:madvise_willneed() function allows local denial of service (CVE-2017-18208)
• kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c (CVE-2019-11811)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1765670)
• [MRG/R] pip_stress hangs when a priority inversion occurs (BZ#1772562)

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

• MRG Realtime 2 x86_64

Fixes

• BZ - 1481136 - CVE-2017-10661 kernel: Handling of might_cancel queueing is not properly pretected against race
• BZ - 1551565 - CVE-2017-18208 kernel: Inifinite loop vulnerability in mm/madvise.c:madvise_willneed() function allows local denial of service
• BZ - 1664110 - CVE-2019-5489 Kernel: page cache side channel attacks
• BZ - 1709180 - CVE-2019-11811 kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c
• BZ - 1765670 - update the MRG 2.5.z 3.10 realtime-kernel sources

CVEs

• CVE-2017-10661
• CVE-2017-18208
• CVE-2019-5489
• CVE-2019-11811

References