Important: kernel security and bug fix update

Topic

An update for kernel is now available for Red Hat Enterprise Linux 9.0 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: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)
• kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags (CVE-2023-3812)
• kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)
• kernel: netfilter: nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID leads to use-after-free (CVE-2023-4147)
• kernel: netfilter: potential slab-out-of-bound access due to integer underflow (CVE-2023-42753)
• kernel: use-after-free due to race condition in qdisc_graft() (CVE-2023-0590)
• hw: amd: Cross-Process Information Leak (CVE-2023-20593)

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):

• RHEL9.0.z [32TB/240c]: kdump service failed to start when 32TB lpar is activated with desired_memory 100gb and max memory 32TB. (BZ#2192541)
• RHEL9.0 - kernel: fix __clear_user() inline assembly constraints (BZ#2192601)
• RH2143007- LPAR is crashed by Phyp when doing DLPAR CPU operations (BZ#2193374)
• RHEL-9.0/9.1 - During DLPAR operations in shared mode and dedicated mode with smt loop, device tree entries are not getting populated(dlpar operation was success)[Denali/Everest][P10][5.14.0-121.el9.ppc64le] (BZ#2196443)
• [Intel 9.2 BUG] [SPR] IOMMU: QAT Device Address Translation Issue with Invalidation Completion Ordering (BZ#2221162)
• rtmutex: Incorrect waiter woken when requeueing in rt_mutex_adjust_prio_chain() (BZ#2222126)
• [RHEL9] blktests nvme/047 lead kernel NULL pointer (BZ#2230134)
• ISST-LTE: [P10] rinlp97 RHEL9.2 RC build - LTP test via SLS suite fails with a crash after running for 19hrs at "kernel BUG at lib/dynamic_queue_limits.c:27!" (BZ#2236700)

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 9.0 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.0 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.0 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.0 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.0 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 9.0 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 9.0 ppc64le
• Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 9.0 s390x
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 9.0 aarch64
• Red Hat Enterprise Linux Server for ARM 64 - 4 years of updates 9.0 aarch64
• Red Hat Enterprise Linux Server for IBM z Systems - 4 years of updates 9.0 s390x

Fixes

• BZ - 2165741 - CVE-2023-0590 kernel: use-after-free due to race condition in qdisc_graft()
• BZ - 2217845 - CVE-2023-20593 hw: amd: Cross-Process Information Leak
• BZ - 2224048 - CVE-2023-3812 kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags
• BZ - 2225097 - CVE-2023-3776 kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function
• BZ - 2225239 - CVE-2023-4147 kernel: netfilter: nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID leads to use-after-free
• BZ - 2225275 - CVE-2023-4004 kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()
• BZ - 2239843 - CVE-2023-42753 kernel: netfilter: potential slab-out-of-bound access due to integer underflow

CVEs

• CVE-2023-0590
• CVE-2023-3776
• CVE-2023-3812
• CVE-2023-4004
• CVE-2023-4147
• CVE-2023-20593
• CVE-2023-42753

References

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