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Red Hat 7 RHSA-2021:0338-01 moderate: kernel-rt security update

red hat
Calendar Grey February 2, 2021
Scroller Redhat
Kernel-rt upgrade delivers vital security patches and bug resolutions for Red Hat Enterprise Linux with moderate significance. Restart necessary.
An update for kernel-rt 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: use-after-free in fs/block_dev.c (CVE-2020-15436)
* kernel: Nfsd failure to clear umask after processing an open or create (CVE-2020-35513)
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):
* kernel-rt: update to the latest RHEL7.9.z3 source tree (BZ#1906133)
* [kernel-rt] WARNING: CPU: 8 PID: 586 at kernel/sched/core.c:3644 migrate_enable+0x15f/0x210 (BZ#1916123)
* [kernel-rt-debug] [ BUG: bad unlock balance detected! ] [RHEL-7.9.z] (BZ#1916130)

Topics%20covered

Topics Covered

security advisory security issue Red Hat update red hat bug fix security fix Red Hat Enterprise Linux moderate impact kernel-rt real-time kernel Real Time Linux real time kernel medium alert

References

https://access.redhat.com/security/cve/CVE-2020-15436 https://access.redhat.com/security/cve/CVE-2020-35513 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.15.2.rt56.1152.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.15.2.rt56.1152.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.15.2.rt56.1152.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source:

Read the Full Advisory


Advisory ID: RHSA-2021:0338-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0338
Issue date: 2021-02-02

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat update red hat bug fix security fix Red Hat Enterprise Linux moderate impact kernel-rt real-time kernel Real Time Linux real time kernel medium alert

Relevant Releases Architectures

Red Hat Enterprise Linux for Real Time (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

Bugs Fixed

1901168 - CVE-2020-15436 kernel: use-after-free in fs/block_dev.c

1906133 - kernel-rt: update to the latest RHEL7.9.z3 source tree

1911309 - CVE-2020-35513 kernel: Nfsd failure to clear umask after processing an open or create

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