Important: kernel security, bug fix, and enhancement update

Topic

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.

Description

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

Security Fix(es):

• kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events (CVE-2023-2235)
• kernel: ipvlan: out-of-bounds write caused by unclear skb->cb (CVE-2023-3090)
• kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)
• kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128)
• kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001)
• kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference (CVE-2020-36558)
• kernel: LoadPin bypass via dm-verity table reload (CVE-2022-2503)
• kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873)
• kernel: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice (CVE-2022-36879)
• kernel: use-after-free due to race condition in qdisc_graft() (CVE-2023-0590)
• kernel: netfilter: NULL pointer dereference in nf_tables due to zeroed list head (CVE-2023-1095)
• kernel: hash collisions in the IPv6 connection lookup table (CVE-2023-1206)

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):

• [HPEMC RHEL 8 REGRESSION] acpi-cpufreq: Skip initialization if a cpufreq driver exists (BZ#2186307)
• [max] RHEL8.4 Pre-Alpha - [ 4.18.0-240.4.el8.dt2.ppc64le ][ fleetwood / P9 64TB/192c ] While performing DLPAR CPU operations "BUG: arch topology borken" messages are observed and CPU remove operation fails for removal of 140 with 255 return (BZ#2210295)
• [Intel 8.8 BUG] [SPR] IOMMU: QAT Device Address Translation Issue with Invalidation Completion Ordering (BZ#2221098)
• avoid unnecessary page fault retires on shared memory types (BZ#2221101)
• [i40e] error: Cannot set interface MAC/vlanid to 1e:b7:e2:02:b1:aa/0 for ifname ens4f0 vf 0: Resource temporarily unavailable (BZ#2228164)
• oops on cifs_mount due to null tcon (BZ#2229129)
• kernel panic due to stack overflow on ppc64le due to deep call chain. (BZ#2230268)
• [Hyper-V][RHEL 8]incomplete fc_transport implementation in storvsc causes null dereference in fc_timed_out() (BZ#2230744)
• Withdrawal: GFS2: couldn't freeze filesystem: -16 (BZ#2231826)
• [RHEL 8][Hyper-V]Excessive hv_storvsc driver logging with srb_status SRB_STATUS_INTERNAL_ERROR (0x30) (BZ#2231989)
• kernel-devel RPM cross-compiled by CKI contains host-arch scripts (BZ#2232138)
• RHEL-8: crypto: rng - Fix lock imbalance in crypto_del_rng (BZ#2232216)
• [Intel 8.9] iavf: Driver Update (BZ#2232400)
• Important iavf bug fixes July 2023 (BZ#2232401)
• iavf: hang in iavf_remove() - SNO node hangs after running systemctl reboot (BZ#2232404)
• [RHEL 8.9] Proactively backport locking fixes from upstream (BZ#2235394)
• NAT sport clash in OCP causing 1 second TCP connection establishment delay. (BZ#2236515)
• xfs: mount fails when device file name is long (BZ#2236814)
• netfilter: RHEL 8.8 phase 2 backports from upstream (BZ#2236817)
• swap deadlock when attempt to charge a page to a cgroup stalls waiting on I/O plugged on another task in swap code (BZ#2237686)

Enhancement(s):

• [Intel 8.7 FEAT] TSC: Avoid clock watchdog when not needed (BZ#2216051)

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.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Virtualization Host 4 for RHEL 8 x86_64
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.6 aarch64

Fixes

• BZ - 2112693 - CVE-2020-36558 kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference
• BZ - 2119048 - CVE-2022-2873 kernel: an out-of-bounds vulnerability in i2c-ismt driver
• BZ - 2119855 - CVE-2022-36879 kernel: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice
• BZ - 2165741 - CVE-2023-0590 kernel: use-after-free due to race condition in qdisc_graft()
• BZ - 2173973 - CVE-2023-1095 kernel: netfilter: NULL pointer dereference in nf_tables due to zeroed list head
• BZ - 2175903 - CVE-2023-1206 kernel: hash collisions in the IPv6 connection lookup table
• BZ - 2177862 - CVE-2022-2503 kernel: LoadPin bypass via dm-verity table reload
• BZ - 2192589 - CVE-2023-2235 kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events
• BZ - 2218672 - CVE-2023-3090 kernel: ipvlan: out-of-bounds write caused by unclear skb->cb
• BZ - 2220892 - CVE-2023-35001 kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval()
• BZ - 2225275 - CVE-2023-4004 kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()
• BZ - 2225511 - CVE-2023-4128 kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route

CVEs

• CVE-2020-36558
• CVE-2022-2503
• CVE-2022-2873
• CVE-2022-36879
• CVE-2023-0590
• CVE-2023-1095
• CVE-2023-1206
• CVE-2023-2235
• CVE-2023-3090
• CVE-2023-4004
• CVE-2023-4128
• CVE-2023-35001

References

• https://access.redhat.com/security/updates/classification/#important