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

Synopsis:          Important: kernel security, bug fix, and enhancement update
Advisory ID:       RHSA-2023:4789-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:4789
Issue date:        2023-08-29
CVE Names:         CVE-2021-33656 CVE-2022-42896 CVE-2023-1637 
                   CVE-2023-1829 CVE-2023-2002 CVE-2023-2124 
                   CVE-2023-3390 CVE-2023-20593 CVE-2023-28466 
                   CVE-2023-35788 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.6
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 CodeReady Linux Builder EUS (v.8.6) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS EUS (v.8.6) - 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: use-after-free in l2cap_connect and l2cap_le_connect_req in
net/bluetooth/l2cap_core.c (CVE-2022-42896)

* kernel: Use-after-free vulnerability in the Linux Kernel traffic control
index filter (CVE-2023-1829)

* kernel: UAF in nftables when nft_set_lookup_global triggered after
handling named and anonymous sets in batch requests (CVE-2023-3390)

* kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()
(CVE-2023-35788)

* kernel: when setting font with malicious data by ioctl PIO_FONT, kernel
will write memory out of bounds (CVE-2021-33656)

* kernel: save/restore speculative MSRs during S3 suspend/resume
(CVE-2023-1637)

* Kernel: bluetooth: Unauthorized management command execution
(CVE-2023-2002)

* kernel: OOB access in the Linux kernel's XFS subsystem (CVE-2023-2124)

* hw: amd: Cross-Process Information Leak (CVE-2023-20593)

* kernel: tls: race condition in do_tls_getsockopt may lead to
use-after-free or NULL pointer dereference (CVE-2023-28466)

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):

* Simultaneous writes to a page on xfs can result in zero-byte data
(BZ#2184103)

* Invalid character detected by rpminspect in
Documentation/translations/zh_CN/process/magic-number.rst (BZ#2208286)

* Low memory deadlock with md devices and external (imsm) metadata handling
- - requires a kernfs notification backport (BZ#2208542)

* Windows Server 2019 guest randomly pauses with "KVM: entry failed,
hardware error 0x80000021" (BZ#2211663)

* Marvell 8.7 Bug qedi shutdown handler hangs upon reboot (BZ#2215334)

* aacraid misses interrupts when a CPU is disabled resulting in scsi
timeouts and the adapter being unusable until reboot. (BZ#2216499)

* rbd: avoid fast-diff corruption in snapshot-based mirroring [8.9]
(BZ#2216770)

* OCS 4.8 cephfs kernel crash :  mds_dispatch ceph_handle_snap unable to
handle kernel NULL (BZ#2218273)

* FJ8.6 Bug: System panic occurs because the list used by i40e driver is
corrupted (BZ#2219262)

* st_gmac tx-checksum offload on vlan is not consistent with st_gmac
interface (BZ#2219908)

* Regression of 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()")
(BZ#2220811)

* refcount_t overflow often happens in mem_cgroup_id_get_online()
(BZ#2221011)

* Scheduler update (rhel8.8) (BZ#2221304)

* RHEL8.6 boot panic with message "kernel BUG at lib/list_debug.c:28!"
(BZ#2222247)

* Enable conntrack clash resolution for GRE (BZ#2223543)

* Intel 8.8 BUG SPR perf: Workaround the UPI 
intel_uncore_has_discovery_tables issue on SPR MCC and LCC (BZ#2225514)

* KVM: x86: fix sending PV IPI (BZ#2226580)

* libceph: harden msgr2.1 frame segment length checks [8.x] (BZ#2227074)

Enhancement(s):

* Mellanox 8.7 FEAT mlx5: It's possible to enable LRO when XDP is active
(BZ#2165585)

* Export symbol pci_find_host_bridge (BZ#2225335)

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/):

2108696 - CVE-2021-33656 kernel: when setting font with malicious data by ioctl PIO_FONT, kernel will write memory out of bounds
2147364 - CVE-2022-42896 kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c
2179000 - CVE-2023-28466 kernel: tls: race condition in do_tls_getsockopt may lead to use-after-free or NULL pointer dereference
2181891 - CVE-2023-1637 kernel: save/restore speculative MSRs during S3 suspend/resume
2187308 - CVE-2023-2002 Kernel: bluetooth: Unauthorized management command execution
2187439 - CVE-2023-2124 kernel: OOB access in the Linux kernel's XFS subsystem
2188470 - CVE-2023-1829 kernel: Use-after-free vulnerability in the Linux Kernel traffic control index filter
2213260 - CVE-2023-3390 kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests
2215768 - CVE-2023-35788 kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()
2217845 - CVE-2023-20593 hw: amd: Cross-Process Information Leak

6. Package List:

Red Hat Enterprise Linux BaseOS EUS (v.8.6):

Source:
kernel-4.18.0-372.70.1.el8_6.src.rpm

aarch64:
bpftool-4.18.0-372.70.1.el8_6.aarch64.rpm
bpftool-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-core-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-cross-headers-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-core-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-devel-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-modules-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-modules-extra-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-devel-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-headers-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-modules-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-modules-extra-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-tools-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-tools-libs-4.18.0-372.70.1.el8_6.aarch64.rpm
perf-4.18.0-372.70.1.el8_6.aarch64.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
python3-perf-4.18.0-372.70.1.el8_6.aarch64.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm

noarch:
kernel-abi-stablelists-4.18.0-372.70.1.el8_6.noarch.rpm
kernel-doc-4.18.0-372.70.1.el8_6.noarch.rpm

ppc64le:
bpftool-4.18.0-372.70.1.el8_6.ppc64le.rpm
bpftool-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-core-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-cross-headers-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-core-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-devel-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-modules-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-devel-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-headers-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-modules-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-modules-extra-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-tools-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-tools-libs-4.18.0-372.70.1.el8_6.ppc64le.rpm
perf-4.18.0-372.70.1.el8_6.ppc64le.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
python3-perf-4.18.0-372.70.1.el8_6.ppc64le.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm

s390x:
bpftool-4.18.0-372.70.1.el8_6.s390x.rpm
bpftool-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-core-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-cross-headers-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debug-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debug-core-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debug-devel-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debug-modules-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debug-modules-extra-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-devel-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-headers-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-modules-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-modules-extra-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-tools-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-zfcpdump-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-zfcpdump-core-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-zfcpdump-devel-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-zfcpdump-modules-4.18.0-372.70.1.el8_6.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-372.70.1.el8_6.s390x.rpm
perf-4.18.0-372.70.1.el8_6.s390x.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm
python3-perf-4.18.0-372.70.1.el8_6.s390x.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.s390x.rpm

x86_64:
bpftool-4.18.0-372.70.1.el8_6.x86_64.rpm
bpftool-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-core-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-cross-headers-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-core-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-devel-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-modules-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-modules-extra-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-devel-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-headers-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-modules-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-modules-extra-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-tools-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-tools-libs-4.18.0-372.70.1.el8_6.x86_64.rpm
perf-4.18.0-372.70.1.el8_6.x86_64.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
python3-perf-4.18.0-372.70.1.el8_6.x86_64.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm

Red Hat CodeReady Linux Builder EUS (v.8.6):

aarch64:
bpftool-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
kernel-tools-libs-devel-4.18.0-372.70.1.el8_6.aarch64.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.aarch64.rpm

ppc64le:
bpftool-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-372.70.1.el8_6.ppc64le.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.ppc64le.rpm

x86_64:
bpftool-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debug-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-tools-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
kernel-tools-libs-devel-4.18.0-372.70.1.el8_6.x86_64.rpm
perf-debuginfo-4.18.0-372.70.1.el8_6.x86_64.rpm
python3-perf-debuginfo-4.18.0-372.70.1.el8_6.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-2021-33656
https://access.redhat.com/security/cve/CVE-2022-42896
https://access.redhat.com/security/cve/CVE-2023-1637
https://access.redhat.com/security/cve/CVE-2023-1829
https://access.redhat.com/security/cve/CVE-2023-2002
https://access.redhat.com/security/cve/CVE-2023-2124
https://access.redhat.com/security/cve/CVE-2023-3390
https://access.redhat.com/security/cve/CVE-2023-20593
https://access.redhat.com/security/cve/CVE-2023-28466
https://access.redhat.com/security/cve/CVE-2023-35788
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 2023 Red Hat, Inc.
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