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Hash: SHA256

====================================================================                   Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:2730-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2730
Issue date:        2021-07-20
CVE Names:         CVE-2021-3347 CVE-2021-33034 CVE-2021-33909 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.6 Update Services for SAP
Solutions.

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 AUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.6) - noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* kernel: size_t-to-int conversion vulnerability in the filesystem layer
(CVE-2021-33909)

* kernel: Use after free via PI futex state (CVE-2021-3347)

* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an
hci_chan (CVE-2021-33034)

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):

* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap
[7.9.z] (BZ#1975159)

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

The system must be rebooted for this update to take effect.

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

1922249 - CVE-2021-3347 kernel: Use after free via PI futex state
1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan
1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer

6. Package List:

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

Source:
kernel-3.10.0-957.78.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.78.2.el7.noarch.rpm
kernel-doc-3.10.0-957.78.2.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.78.2.el7.x86_64.rpm
kernel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm
kernel-devel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-headers-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.78.2.el7.x86_64.rpm
perf-3.10.0-957.78.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.6):

Source:
kernel-3.10.0-957.78.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.78.2.el7.noarch.rpm
kernel-doc-3.10.0-957.78.2.el7.noarch.rpm

ppc64le:
kernel-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debug-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-devel-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-headers-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-tools-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.78.2.el7.ppc64le.rpm
perf-3.10.0-957.78.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
python-perf-3.10.0-957.78.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm

x86_64:
kernel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm
kernel-devel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-headers-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.78.2.el7.x86_64.rpm
perf-3.10.0-957.78.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm

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

Source:
kernel-3.10.0-957.78.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.78.2.el7.noarch.rpm
kernel-doc-3.10.0-957.78.2.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.78.2.el7.x86_64.rpm
kernel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm
kernel-devel-3.10.0-957.78.2.el7.x86_64.rpm
kernel-headers-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.78.2.el7.x86_64.rpm
perf-3.10.0-957.78.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.78.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.6):

ppc64le:
kernel-debug-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.78.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.78.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.78.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.78.2.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-2021-3347
https://access.redhat.com/security/cve/CVE-2021-33034
https://access.redhat.com/security/cve/CVE-2021-33909
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2021-006

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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RedHat: RHSA-2021-2730:01 Important: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update Support, and Red Hat Enterprise L...

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)
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):
* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1975159)

Summary

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.

References

https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/cve/CVE-2021-33034 https://access.redhat.com/security/cve/CVE-2021-33909 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/RHSB-2021-006

Package List

Red Hat Enterprise Linux Server AUS (v. 7.6):
Source: kernel-3.10.0-957.78.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.78.2.el7.noarch.rpm kernel-doc-3.10.0-957.78.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.78.2.el7.x86_64.rpm kernel-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm kernel-devel-3.10.0-957.78.2.el7.x86_64.rpm kernel-headers-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.78.2.el7.x86_64.rpm perf-3.10.0-957.78.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm python-perf-3.10.0-957.78.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.6):
Source: kernel-3.10.0-957.78.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.78.2.el7.noarch.rpm kernel-doc-3.10.0-957.78.2.el7.noarch.rpm
ppc64le: kernel-3.10.0-957.78.2.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debug-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.78.2.el7.ppc64le.rpm kernel-devel-3.10.0-957.78.2.el7.ppc64le.rpm kernel-headers-3.10.0-957.78.2.el7.ppc64le.rpm kernel-tools-3.10.0-957.78.2.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm kernel-tools-libs-3.10.0-957.78.2.el7.ppc64le.rpm perf-3.10.0-957.78.2.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm python-perf-3.10.0-957.78.2.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
x86_64: kernel-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm kernel-devel-3.10.0-957.78.2.el7.x86_64.rpm kernel-headers-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.78.2.el7.x86_64.rpm perf-3.10.0-957.78.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm python-perf-3.10.0-957.78.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.6):
Source: kernel-3.10.0-957.78.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.78.2.el7.noarch.rpm kernel-doc-3.10.0-957.78.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.78.2.el7.x86_64.rpm kernel-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm kernel-devel-3.10.0-957.78.2.el7.x86_64.rpm kernel-headers-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.78.2.el7.x86_64.rpm perf-3.10.0-957.78.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm python-perf-3.10.0-957.78.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.78.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.6):
ppc64le: kernel-debug-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debug-devel-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.78.2.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-957.78.2.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.ppc64le.rpm
x86_64: kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.78.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.78.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.78.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.78.2.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/

Severity

Advisory ID: RHSA-2021:2730-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2021:2730

Issued Date: : 2021-07-20

CVE Names: CVE-2021-3347 CVE-2021-33034 CVE-2021-33909

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.6 Update Services for SAPSolutions.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.