Headline

RHSA-2022:0821: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

Related CVEs:

CVE-2021-4083: kernel: fget: check that the fd still exists after getting a ref to it
CVE-2022-0330: kernel: possible privileges escalation due to missing TLB flush
CVE-2022-0492: kernel: cgroups v1 release_agent feature may allow privilege escalation
CVE-2022-0847: kernel: improper initialization of the “flags” member of the new pipe_buffer
CVE-2022-22942: kernel: failing usercopy allows for use-after-free exploitation

3 years ago

Red Hat Security Data

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Issued:

2022-03-10

Updated:

2022-03-10

RHSA-2022:0821 - Security Advisory

Overview
Updated Packages

Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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: improper initialization of the “flags” member of the new pipe_buffer (CVE-2022-0847)
kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)
kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)
kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)

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 RT source tree to the latest RHEL-8.2.z16 Batch (BZ#2057698)

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.

Affected Products

Red Hat Enterprise Linux for Real Time - Telecommunications Update Service 8.2 x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service 8.2 x86_64

Fixes

BZ - 2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it
BZ - 2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush
BZ - 2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation
BZ - 2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation
BZ - 2060795 - CVE-2022-0847 kernel: improper initialization of the “flags” member of the new pipe_buffer

CVEs

CVE-2021-4083
CVE-2022-0330
CVE-2022-0492
CVE-2022-0847
CVE-2022-22942

References

https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2022-002

Red Hat Enterprise Linux for Real Time - Telecommunications Update Service 8.2

SRPM

kernel-rt-4.18.0-193.79.1.rt13.129.el8_2.src.rpm

SHA-256: ec94e249e1ecbb00773306ecae25f4e206a526b5fbcfaf8784a2cc27f9a4e77a

x86_64

kernel-rt-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 5f597b3303a9c90236cefdbf66b7983fa8f5365e7c82fc7092d71e010478c788

kernel-rt-core-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 636933864b5f5bedbd8a0586b740b31b782e300367cacfb39cdacf1373ca17aa

kernel-rt-debug-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 6fe5315183909eccf7d6a28659b98e52b1f9dae62da41cc0a7e643446b080965

kernel-rt-debug-core-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 00435a6bb7448ff7c6361dbf3abaf3517ae1bb9a676528bb0676e8611a71316c

kernel-rt-debug-debuginfo-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 1ab7a100c0c4640e4f09e7c6d295911c5f1cb060b0b4f1a1f5e1c44ad49f212d

kernel-rt-debug-devel-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: cba33be0945c533f38a108c3777d66bf452d2b47cc78372f3f7c1e40a1c44e08

kernel-rt-debug-modules-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 131ea4e4e32b003dfe25aa82980e850d54a00c0258a54dfaeff97f8ef8cff79a

kernel-rt-debug-modules-extra-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: d9f5dba76d7522780ef5ec528ddf49881cc2cd796ee8b7c40a07615b3b97609f

kernel-rt-debuginfo-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: fee36ccb49560b0e73d96cc7f4d959f48961e2903aa0518fc70c560564f8e101

kernel-rt-debuginfo-common-x86_64-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 5cdfc5201b31773735793e8fe8c2c18f8865038b35249fbd1097f87cb8915442

kernel-rt-devel-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: fa14f2476021b8cb98e229be1698890c0204fc7eb465465db986113ddd31a90e

kernel-rt-modules-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 2e5a15972b80e6924178c3730df945ecaa319d1be8956deaabc83c1eeaf50634

kernel-rt-modules-extra-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm

SHA-256: 4ea9eb920004502cf93b0b6435c68131afb9ef848ef1922b3a1a912b411f0589

Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service 8.2