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Red Hat 8: RHSA-2022:0176-01 Important: Kernel-RT Heap Overflow

red hat
Calendar Grey January 19, 2022
Dist Redhat Esm H88
Essential kernel-rt upgrade for Red Hat 8 addresses severe concerns such as memory exposure and buffer overflow flaws.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8

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: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
* kernel: fs_context: heap overflow in legacy parameter handling (CVE-2022-0185)
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):
* kernnel-rt-debug: do not call blocking ops when !TASK_RUNNING; state=1 set at [<0000000050e86018>] handle_userfault+0x530/0x1820 (BZ#2029422)
* kernel-rt: update RT source tree to the RHEL-8.5.z source tree (BZ#2032059)

Topics%20covered

Topics Covered

security advisory Red Hat important heap overflow data leak kernel-rt

References

https://access.redhat.com/security/cve/CVE-2021-4155 https://access.redhat.com/security/cve/CVE-2022-0185 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-348.12.2.rt7.143.el8_5.src.rpm
x86_64: kernel-rt-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-core-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-core-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-devel-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-kvm-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-modules-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debuginfo-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-devel-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-kvm-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-modules-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-modules-extra-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 8):
Source: kernel-rt-4.18.0-348.12.2.rt7.143.el8_5.src.rpm
x86_64: kernel-rt-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm kernel-rt-core-4.18.0-348.12.2.rt7.143.el8_5.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0176-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0176
Issue date: 2022-01-19

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.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 Red Hat important heap overflow data leak kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64

Red Hat Enterprise Linux for Real Time (v. 8) - x86_64

Bugs Fixed

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

2040358 - CVE-2022-0185 kernel: fs_context: heap overflow in legacy parameter handling

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