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Red Hat: RHSA-2018-3656 Important Security Update for Kernel-Alt

red hat
Calendar Grey November 26, 2018
Dist Redhat Esm H88
Crucial kernel-alt security enhancement and bug resolution patch released for Red Hat Enterprise Linux 7 tackling severe CVE vulnerabilities.
An update for kernel-alt is now available for Red Hat Enterprise Linux 7

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.

Summary

The kernel-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* kernel: Use-after-free in the vmacache_flush_all function resulting in a possible privilege escalation (CVE-2018-17182)
* kernel: Privilege escalation on arm64 via KVM hypervisor (CVE-2018-18021)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
These updated kernel packages include also numerous bug fixes. Space precludes documenting all of the bug fixes in this advisory. See the descriptions in the related Knowledge Article: https://access.redhat.com/articles/3714391

Topics%20covered

Topics Covered

security advisory privilege escalation bug fix Red Hat Enterprise security impact important update kernel-alt

References

https://access.redhat.com/security/cve/CVE-2018-17182 https://access.redhat.com/security/cve/CVE-2018-18021 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/3714391

Package List

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source: kernel-alt-4.14.0-115.2.2.el7a.src.rpm
aarch64: kernel-4.14.0-115.2.2.el7a.aarch64.rpm kernel-debug-4.14.0-115.2.2.el7a.aarch64.rpm kernel-debug-debuginfo-4.14.0-115.2.2.el7a.aarch64.rpm kernel-debug-devel-4.14.0-115.2.2.el7a.aarch64.rpm kernel-debuginfo-4.14.0-115.2.2.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-115.2.2.el7a.aarch64.rpm kernel-devel-4.14.0-115.2.2.el7a.aarch64.rpm kernel-headers-4.14.0-115.2.2.el7a.aarch64.rpm kernel-tools-4.14.0-115.2.2.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-115.2.2.el7a.aarch64.rpm kernel-tools-libs-4.14.0-115.2.2.el7a.aarch64.rpm perf-4.14.0-115.2.2.el7a.aarch64.rpm perf-debuginfo-4.14.0-115.2.2.el7a.aarch64.rpm python-perf-4.14.0-115.2.2.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-115.2.2.el7a.aarch64.rpm
noarch: kernel-abi-whitelists-4.14.0-115.2.2.el7a.noarch.rpm kernel-doc-4.14.0-115.2.2.el7a.noarch.rpm
ppc64le: kernel-4.14.0-115.2.2.el7a.ppc64le.rpm kernel-bootwrapper-4.14.0-115.2.2.el7a.ppc64le.rpm kernel-debug-4.14.0-115.2.2.el7a.ppc64le.rpm kernel-debug-debuginfo-4.14.0-115.2.2.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-115.2.2.el7a.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.14.0-115.2.2.el7a.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:3656-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3656
Issue date: 2018-11-26

Topic

An update for kernel-alt is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory privilege escalation bug fix Red Hat Enterprise security impact important update kernel-alt

Relevant Releases Architectures

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le

Bugs Fixed

1631205 - CVE-2018-17182 kernel: Use-after-free in the vmacache_flush_all function resulting in a possible privilege escalation

1635475 - CVE-2018-18021 kernel: Privilege escalation on arm64 via KVM hypervisor

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