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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:3327-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3327
Issue date:        2021-08-31
CVE Names:         CVE-2020-27777 CVE-2021-22555 CVE-2021-29154 
                   CVE-2021-29650 CVE-2021-32399 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.

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 Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

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

Security Fix(es):

* kernel: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)

* kernel: race condition for removal of the HCI controller (CVE-2021-32399)

* kernel: powerpc: RTAS calls can be used to compromise kernel integrity
(CVE-2020-27777)

* kernel: Local privilege escalation due to incorrect BPF JIT branch
displacement computation (CVE-2021-29154)

* kernel: lack a full memory barrier upon the assignment of a new table
value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h
may lead to DoS (CVE-2021-29650)

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):

* SAN Switch rebooted and caused (?) OpenStack compute node to reboot
(BZ#1897576)

* sysfs: cannot create duplicate filename '/class/mdio_bus/ixgbe-8100
(BZ#1915449)

* XFS: read-only recovery does not update free space accounting in
superblock (BZ#1921551)

* The memcg_params field of kmem_cache struct contains an old slab address
that is to small for the current size of memcg_limited_groups_array_size.
(BZ#1951810)

* Backport of upstream patch "net: Update window_clamp if SOCK_RCVBUF is
set " into rhel-7 (BZ#1962196)

* Kernel panic in init_cq_frag_buf (BZ#1962499)

* futex: futex_requeue can potentially free the pi_state structure twice
(BZ#1966856)

* be_poll lockup doing ifenslave when netconsole using bond (BZ#1971744)

* OCP4.7 nodes panic at BUG_ON in nf_nat_setup_info() (BZ#1972970)

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/):

1897576 - SAN Switch rebooted and caused (?) OpenStack compute node to reboot
1900844 - CVE-2020-27777 kernel: powerpc: RTAS calls can be used to compromise kernel integrity
1945388 - CVE-2021-29650 kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS
1946684 - CVE-2021-29154 kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation
1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
kernel-3.10.0-1160.41.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.41.1.el7.noarch.rpm
kernel-doc-3.10.0-1160.41.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1160.41.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-headers-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.41.1.el7.x86_64.rpm
perf-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
kernel-3.10.0-1160.41.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.41.1.el7.noarch.rpm
kernel-doc-3.10.0-1160.41.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1160.41.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-headers-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.41.1.el7.x86_64.rpm
perf-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
kernel-3.10.0-1160.41.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.41.1.el7.noarch.rpm
kernel-doc-3.10.0-1160.41.1.el7.noarch.rpm

ppc64:
bpftool-3.10.0-1160.41.1.el7.ppc64.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debug-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-devel-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-headers-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-tools-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-1160.41.1.el7.ppc64.rpm
perf-3.10.0-1160.41.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
python-perf-3.10.0-1160.41.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm

ppc64le:
bpftool-3.10.0-1160.41.1.el7.ppc64le.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debug-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-devel-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-headers-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-tools-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-1160.41.1.el7.ppc64le.rpm
perf-3.10.0-1160.41.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
python-perf-3.10.0-1160.41.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm

s390x:
bpftool-3.10.0-1160.41.1.el7.s390x.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.s390x.rpm
kernel-3.10.0-1160.41.1.el7.s390x.rpm
kernel-debug-3.10.0-1160.41.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-1160.41.1.el7.s390x.rpm
kernel-devel-3.10.0-1160.41.1.el7.s390x.rpm
kernel-headers-3.10.0-1160.41.1.el7.s390x.rpm
kernel-kdump-3.10.0-1160.41.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-1160.41.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-1160.41.1.el7.s390x.rpm
perf-3.10.0-1160.41.1.el7.s390x.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.s390x.rpm
python-perf-3.10.0-1160.41.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.s390x.rpm

x86_64:
bpftool-3.10.0-1160.41.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-headers-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.41.1.el7.x86_64.rpm
perf-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
bpftool-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-1160.41.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.ppc64.rpm

ppc64le:
bpftool-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-1160.41.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.ppc64le.rpm

x86_64:
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
kernel-3.10.0-1160.41.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.41.1.el7.noarch.rpm
kernel-doc-3.10.0-1160.41.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1160.41.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-devel-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-headers-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.41.1.el7.x86_64.rpm
perf-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
bpftool-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.41.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.41.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.41.1.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-2020-27777
https://access.redhat.com/security/cve/CVE-2021-22555
https://access.redhat.com/security/cve/CVE-2021-29154
https://access.redhat.com/security/cve/CVE-2021-29650
https://access.redhat.com/security/cve/CVE-2021-32399
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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