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Red Hat 7.6 EUS RHSA-2021:0940-01 Important: Kpatch-Patch Locking Issue

Redhat Large Esm H500
An update for kpatch-patch is now available for Red Hat Enterprise Linux 7.6 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,
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====================================================================                   Red Hat Security Advisory

Synopsis:          Important: kpatch-patch security update
Advisory ID:       RHSA-2021:0940-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:0940
Issue date:        2021-03-18
CVE Names:         CVE-2020-29661 
====================================================================
1. Summary:

An update for kpatch-patch is now available for Red Hat Enterprise Linux
7.6 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64le, x86_64

3. Description:

This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.

Security Fix(es):

* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an
use-after-free (CVE-2020-29661)

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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free

6. Package List:

Red Hat Enterprise Linux Server EUS (v. 7.6):

Source:
kpatch-patch-3_10_0-957_46_1-1-4.el7.src.rpm
kpatch-patch-3_10_0-957_48_1-1-4.el7.src.rpm
kpatch-patch-3_10_0-957_54_1-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_56_1-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_58_2-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_61_1-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_61_2-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_62_1-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_65_1-1-1.el7.src.rpm
kpatch-patch-3_10_0-957_66_1-1-1.el7.src.rpm

ppc64le:
kpatch-patch-3_10_0-957_46_1-1-4.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_48_1-1-4.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_54_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_54_1-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_56_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_56_1-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_58_2-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_58_2-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_1-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_2-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_2-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_62_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_62_1-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_65_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_65_1-debuginfo-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_66_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_66_1-debuginfo-1-1.el7.ppc64le.rpm

x86_64:
kpatch-patch-3_10_0-957_46_1-1-4.el7.x86_64.rpm
kpatch-patch-3_10_0-957_48_1-1-4.el7.x86_64.rpm
kpatch-patch-3_10_0-957_54_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_54_1-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_56_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_56_1-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_58_2-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_58_2-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_1-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_2-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_2-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_62_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_62_1-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_65_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_65_1-debuginfo-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_66_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_66_1-debuginfo-1-1.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2020-29661
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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Red Hat 7.6 EUS RHSA-2021:0940-01 Important: Kpatch-Patch Locking Issue

red hat
Calendar Grey March 18, 2021
Dist Redhat Esm H88
Urgent security patch for kpatch-patch in Red Hat 7.6 EUS resolves a concurrency flaw affecting kernel integrity.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 7.6 Extended Update Support

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

Summary

This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
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.

References

https://access.redhat.com/security/cve/CVE-2020-29661 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server EUS (v. 7.6):
Source: kpatch-patch-3_10_0-957_46_1-1-4.el7.src.rpm kpatch-patch-3_10_0-957_48_1-1-4.el7.src.rpm kpatch-patch-3_10_0-957_54_1-1-1.el7.src.rpm kpatch-patch-3_10_0-957_56_1-1-1.el7.src.rpm kpatch-patch-3_10_0-957_58_2-1-1.el7.src.rpm kpatch-patch-3_10_0-957_61_1-1-1.el7.src.rpm kpatch-patch-3_10_0-957_61_2-1-1.el7.src.rpm kpatch-patch-3_10_0-957_62_1-1-1.el7.src.rpm kpatch-patch-3_10_0-957_65_1-1-1.el7.src.rpm kpatch-patch-3_10_0-957_66_1-1-1.el7.src.rpm
ppc64le: kpatch-patch-3_10_0-957_46_1-1-4.el7.ppc64le.rpm kpatch-patch-3_10_0-957_48_1-1-4.el7.ppc64le.rpm kpatch-patch-3_10_0-957_54_1-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_54_1-debuginfo-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_56_1-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_56_1-debuginfo-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_58_2-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_58_2-debuginfo-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_1-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_1-debuginfo-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_2-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_2-debuginfo-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_62_1-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_62_1-debuginfo-1-1.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0940-01
Product: Red Hat Enterprise Linux
Issue date: 2021-03-18

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux7.6 Extended Update Support.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.

Relevant Releases Architectures

Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64le, x86_64

Bugs Fixed

1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free

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