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: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount

to be dropped twice (CVE-2022-36879)

• kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip

(CVE-2022-41858)

• kernel: use-after-free caused by invalid pointer hostname in fs/cifs/connect.c

(CVE-2023-1195)

• kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)
• kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race

(CVE-2023-3567)

• kernel: use-after-free in netfilter: nf_tables (CVE-2023-3777)
• kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
• kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)
• kernel: IGB driver inadequate buffer size for frames larger than MTU

(CVE-2023-45871)

• kernel: SEV-ES local priv escalation (CVE-2023-46813)

Bug Fix(es):

• RHEL 9 Hyper-V: Excessive hv_storvsc driver logging with srb_status

SRB_STATUS_INTERNAL_ERROR (0x30)

• RHEL9.0 - s390/qeth: NET2016 - fix use-after-free in HSCI
• DM multipath showing failed path for an nvme-o-FC LUN when performing I/O

operations

• XFS: sync to upstream v5.15
• AMDSERVER 9.4 Bug, Turin: Support larger microcode patches

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 - 2119855 - CVE-2022-36879 kernel: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice
• BZ - 2144379 - CVE-2022-41858 kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip
• BZ - 2154171 - CVE-2023-1195 kernel: use-after-free caused by invalid pointer hostname in fs/cifs/connect.c
• BZ - 2187773 - CVE-2023-2162 kernel: UAF during login when accessing the shost ipaddress
• BZ - 2221463 - CVE-2023-3567 kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race
• BZ - 2237750 - CVE-2023-3777 kernel: use-after-free in netfilter: nf_tables
• BZ - 2237757 - CVE-2023-4623 kernel: net/sched: sch_hfsc UAF
• BZ - 2241924 - CVE-2023-5178 kernel: use after free in nvmet_tcp_free_crypto in NVMe
• BZ - 2244723 - CVE-2023-45871 kernel: IGB driver inadequate buffer size for frames larger than MTU
• BZ - 2246944 - CVE-2023-46813 kernel: SEV-ES local priv escalation

CVEs

• CVE-2022-36879
• CVE-2022-41858
• CVE-2023-1195
• CVE-2023-2162
• CVE-2023-3567
• CVE-2023-3777
• CVE-2023-4623
• CVE-2023-5178
• CVE-2023-45871
• CVE-2023-46813

References

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