RHSA-2023:7398 — Security Advisory

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.

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)