Alerts This Week
Warning Icon 1 914
Alerts This Week
Warning Icon 1 914

RedHat: RHSA-2021-2316 Moderate: kernel-rt Null Pointer Issues

red hat
Calendar Grey June 8, 2021
Dist Redhat Esm H88
A significant patch for kernel-rt on Fedora tackles major concerns such as segmentation faults and buffer overflow vulnerabilities.
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: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648)
* kernel: Improper input validation in some Intel(R) Graphics Drivers(CVE-2020-12363)
* kernel: Null pointer dereference in some Intel(R) Graphics Drivers(CVE-2020-12364)
* kernel: Speculation on pointer arithmetic against bpf_context pointer (CVE-2020-27170)
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):
* lru-add-drain workqueue on RT is allocated without being used (BZ#1894587)
* kernel-rt: update to the latest RHEL7.9.z source tree (BZ#1953118)

Topics%20covered

Topics Covered

security advisory security update bug fix important input validation null pointer kernel-rt

References

https://access.redhat.com/security/cve/CVE-2020-8648 https://access.redhat.com/security/cve/CVE-2020-12362 https://access.redhat.com/security/cve/CVE-2020-12363 https://access.redhat.com/security/cve/CVE-2020-12364 https://access.redhat.com/security/cve/CVE-2020-27170 https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.31.1.rt56.1169.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.31.1.rt56.1169.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.31.1.rt56.1169.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2316-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2316
Issue date: 2021-06-08

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 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 security update bug fix important input validation null pointer kernel-rt

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

1802559 - CVE-2020-8648 kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c

1894587 - lru-add-drain workqueue on RT is allocated without being used

1922249 - CVE-2021-3347 kernel: Use after free via PI futex state

1930246 - CVE-2020-12362 kernel: Integer overflow in Intel(R) Graphics Drivers1930249 - CVE-2020-12363 kernel: Improper input validation in some Intel(R) Graphics Drivers1930251 - CVE-2020-12364 kernel: Null pointer dereference in some Intel(R) Graphics Drivers1940627 - CVE-2020-27170 kernel: Speculation on pointer arithmetic against bpf_context pointer

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here