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Red Hat Enterprise Linux 7: RHSA-2022:0622-01 Important Kernel Security Fix

red hat
Calendar Grey February 22, 2022
Dist Redhat Esm H88
Crucial kernel-rt security patch released for Red Hat Enterprise Linux mitigates privilege escalation vulnerabilities and implements bug corrections.
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 eventpoll.c may lead to escalation of privilege (CVE-2020-0466)
* kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)
* kernel: out of bounds write in hid-multitouch.c may lead to escalation of privilege (CVE-2020-0465)
* kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)
* kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)
* kernel: possible use-after-free in bluetooth module (CVE-2021-3752)
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.z12 source tree (BZ#2039101)

Topics%20covered

Topics Covered

security advisory kernel update privilege escalation bug fix Red Hat Enterprise Linux security impact kernel-rt

References

https://access.redhat.com/security/cve/CVE-2020-0465 https://access.redhat.com/security/cve/CVE-2020-0466 https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-3564 https://access.redhat.com/security/cve/CVE-2021-3573 https://access.redhat.com/security/cve/CVE-2021-3752 https://access.redhat.com/security/cve/CVE-2021-4155 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.59.1.rt56.1200.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.59.1.rt56.1200.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.59.1.rt56.1200.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.59.1.rt56.1200.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-2022:0622-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0622
Issue date: 2022-02-22

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 kernel update privilege escalation bug fix Red Hat Enterprise Linux security impact 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

1920471 - CVE-2020-0465 kernel: out of bounds write in hid-multitouch.c may lead to escalation of privilege

1920480 - CVE-2020-0466 kernel: use after free in eventpoll.c may lead to escalation of privilege

1964139 - CVE-2021-3564 kernel: double free in bluetooth subsystem when the HCI device initialization fails

1966578 - CVE-2021-3573 kernel: use-after-free in function hci_sock_bound_ioctl()

1999544 - CVE-2021-3752 kernel: possible use-after-free in bluetooth module

2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation

2034813 - CVE-2021-4155 kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL

2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush

2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation

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