RHSA-2023:7398 - Security Advisory

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: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)
• kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)
• kernel: use-after-free due to race condition occurring in dvb_register_device() (CVE-2022-45884)
• kernel: use-after-free due to race condition occurring in dvb_net.c (CVE-2022-45886)
• kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c (CVE-2022-45919)
• Kernel: NULL pointer dereference problem in sctp_sched_dequeue_common (CVE-2023-2177)

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):

• LPAR is crashed by Phyp when doing DLPAR CPU operations (BZ#2193377)
• ibmvnic: NONFATAL reset causes dql BUG_ON crash (BZ#2236702)
• i40e: backport selected bugfixes (BZ#2238306)
• Random delay receiving packets after bringing up VLAN on top of VF with vf-vlan-pruning enabled (BZ#2240752)
• sctp: fix hb_timer refresh for the pf state on transports (BZ#2245286)
• sctp: sysctl: make extra pointers netns aware (BZ#2245289)

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 for x86_64 - Extended Update Support Extension 8.6 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 - 2148510 - CVE-2022-45884 kernel: use-after-free due to race condition occurring in dvb_register_device()
• BZ - 2148517 - CVE-2022-45886 kernel: use-after-free due to race condition occurring in dvb_net.c
• BZ - 2151956 - CVE-2022-45919 kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c
• BZ - 2187953 - CVE-2023-2177 Kernel: NULL pointer dereference problem in sctp_sched_dequeue_common
• BZ - 2225097 - CVE-2023-3776 kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function
• BZ - 2225201 - CVE-2023-3609 kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails

CVEs

• CVE-2022-45884
• CVE-2022-45886
• CVE-2022-45919
• CVE-2022-50243
• CVE-2022-50274
• CVE-2023-2177
• CVE-2023-3609
• CVE-2023-3776

References

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