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

Synopsis:          Important: kernel security, bug fix, and enhancement update
Advisory ID:       RHSA-2021:0558-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:0558
Issue date:        2021-02-16
CVE Names:         CVE-2020-14351 CVE-2020-25705 CVE-2020-29661
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.

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 CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

3. Description:

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

Security Fix(es):

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

* kernel: performance counters race condition use-after-free
(CVE-2020-14351)

* kernel: ICMP rate limiting can be used for DNS poisoning attack
(CVE-2020-25705)

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):

* Final fixes + drop alpha_support flag requirement for Tigerlake
(BZ#1882620)

* OVS complains Invalid Argument on TCP packets going into conntrack
(BZ#1892744)

* BUG: using smp_processor_id() in preemptible [00000000] code:
handler106/3082 (BZ#1893281)

* Icelake performance - add  intel_idle: Customize IceLake server support
to RHEL-8 (BZ#1897183)

* [mlx5] IPV6 TOS rewrite flows are not getting offloaded in HW
(BZ#1897688)

* RHEL 8.3 SAS - multipathd fails to re-establish paths during controller
random reset (BZ#1900112)

* RHEL8.3 Beta - RHEL8.3 hangs on dbginfo.sh execution, crash dump
generated (mm-) (BZ#1903019)

* Win10 guest automatic reboot after migration in Win10 and WSL2 on AMD
hosts (BZ#1905084)

* block, dm: fix IO splitting for stacked devices (BZ#1905136)

* Failed to hotplug scsi-hd disks (BZ#1905214)

* PCI quirk needed to prevent GPU hang (BZ#1906516)

* RHEL8.2 - various patches to stabilize the OPAL error log processing and
the powernv dump processing (ESS) (BZ#1907301)

* pmtu not working with tunnels as bridge ports and br_netfilter loaded
(BZ#1907576)

* [ThinkPad X13/T14/T14s AMD]: Kdump failed (BZ#1907775)

* NFSv4 client improperly handles interrupted slots (BZ#1908312)

* NFSv4.1 client ignores ERR_DELAY during LOCK recovery, could lead to data
corruption (BZ#1908313)

* [Regression] RHEL8.2 - [kernel 148.el8] cpu (sys) time regression in SAP
HANA 2.0 benchmark benchInsertSubSelectPerformance (BZ#1908519)

* RHEL8: kernel-rt: kernel BUG at kernel/sched/deadline.c:1462!
(BZ#1908731)

* SEV VM hang at efi_mokvar_sysfs_init+0xa9/0x19d during boot (BZ#1909243)

* C6gn support requires "Ensure dirty bit is preserved across
pte_wrprotect" patch (BZ#1909577)

* [Lenovo 8.3 & 8.4 Bug] [Regression] No response from keyboard and mouse
when boot from tboot kernel (BZ#1911555)

* Kernel crash with krb5p (BZ#1912478)

* [RHEL8] Need additional backports for FIPS 800-90A DRBG entropy seeding
source (BZ#1912872)

* [Hyper-V][RHEL-8] Request to included a commit that adds a timeout to
vmbus_wait_for_unload (BZ#1913528)

* Host becomes unresponsive during stress-ng --cyclic test rcu: INFO:
rcu_preempt detected stalls on CPUs/tasks: (BZ#1913964)

* RHEL8.4: Backport upstream RCU patches up to v5.6 (BZ#1915638)

* Missing mm backport to fix regression introduced by another mm backport
(BZ#1915814)

* [Hyper-V][RHEL-8]video: hyperv_fb: Fix the cache type when mapping the
VRAM Edit (BZ#1917711)

* ionic 0000:39:00.0 ens2: IONIC_CMD_Q_INIT (40) failed: IONIC_RC_ERROR
(-5) (BZ#1918372)

* [certification] mlx5_core depends on tls triggering TAINT_TECH_PREVIEW
even if no ConnectX-6 card is present (BZ#1918743)

* kvm-rhel8.3 [AMD] - system crash observed while powering on virtual
machine with attached VF interfaces. (BZ#1919885)

Enhancement(s):

* [Mellanox 8.4 FEAT] mlx5: Add messages when VF-LAG fails to start
(BZ#1892344)

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/):

1862849 - CVE-2020-14351 kernel: performance counters race condition use-after-free
1894579 - CVE-2020-25705 kernel: ICMP rate limiting can be used for DNS poisoning attack
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 BaseOS (v. 8):

Source:
kernel-4.18.0-240.15.1.el8_3.src.rpm

aarch64:
bpftool-4.18.0-240.15.1.el8_3.aarch64.rpm
bpftool-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-core-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-cross-headers-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-core-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-devel-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-modules-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-modules-extra-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-devel-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-headers-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-modules-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-modules-extra-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-tools-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-tools-libs-4.18.0-240.15.1.el8_3.aarch64.rpm
perf-4.18.0-240.15.1.el8_3.aarch64.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
python3-perf-4.18.0-240.15.1.el8_3.aarch64.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm

noarch:
kernel-abi-whitelists-4.18.0-240.15.1.el8_3.noarch.rpm
kernel-doc-4.18.0-240.15.1.el8_3.noarch.rpm

ppc64le:
bpftool-4.18.0-240.15.1.el8_3.ppc64le.rpm
bpftool-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-core-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-cross-headers-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-core-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-devel-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-modules-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-devel-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-headers-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-modules-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-modules-extra-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-tools-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-tools-libs-4.18.0-240.15.1.el8_3.ppc64le.rpm
perf-4.18.0-240.15.1.el8_3.ppc64le.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
python3-perf-4.18.0-240.15.1.el8_3.ppc64le.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm

s390x:
bpftool-4.18.0-240.15.1.el8_3.s390x.rpm
bpftool-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-core-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-cross-headers-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debug-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debug-core-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debug-devel-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debug-modules-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debug-modules-extra-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-devel-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-headers-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-modules-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-modules-extra-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-tools-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-zfcpdump-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-zfcpdump-core-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-zfcpdump-devel-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-zfcpdump-modules-4.18.0-240.15.1.el8_3.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-240.15.1.el8_3.s390x.rpm
perf-4.18.0-240.15.1.el8_3.s390x.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm
python3-perf-4.18.0-240.15.1.el8_3.s390x.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.s390x.rpm

x86_64:
bpftool-4.18.0-240.15.1.el8_3.x86_64.rpm
bpftool-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-core-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-cross-headers-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-core-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-devel-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-modules-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-modules-extra-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-devel-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-headers-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-modules-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-modules-extra-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-tools-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-tools-libs-4.18.0-240.15.1.el8_3.x86_64.rpm
perf-4.18.0-240.15.1.el8_3.x86_64.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
python3-perf-4.18.0-240.15.1.el8_3.x86_64.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm

Red Hat CodeReady Linux Builder (v. 8):

aarch64:
bpftool-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
kernel-tools-libs-devel-4.18.0-240.15.1.el8_3.aarch64.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-240.15.1.el8_3.ppc64le.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debug-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-tools-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
kernel-tools-libs-devel-4.18.0-240.15.1.el8_3.x86_64.rpm
perf-debuginfo-4.18.0-240.15.1.el8_3.x86_64.rpm
python3-perf-debuginfo-4.18.0-240.15.1.el8_3.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-2020-14351
https://access.redhat.com/security/cve/CVE-2020-25705
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 <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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