RHSA-2023:4130 — 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: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation (CVE-2023-1281)

• kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation (CVE-2023-32233)

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):

• RHEL8.4 - s390/smp,vdso: fix ASCE handling (BZ#2176464)

• After powerstore LUNs are mapped, OS crashed and host reboot. (BZ#2179068)

• qla2xxx NVMe-FC: WARNING: CPU: 0 PID: 124072 at drivers/scsi/qla2xxx/qla_init.c:70 qla2xxx_rel_done_warning+0x25/0x30 [qla2xxx] (BZ#2181529)

• iscsi target deadlocks when the same host acts as an initiator to itself (i.e. connects via 127.0.0.1) (BZ#2182095)

• Dying percpu kworkers cause issues on isolated CPUs [rhel-8] (BZ#2189597)

• Azure RHEL8: Live resize of disk does not trigger a rescan of the device capacity (BZ#2192345)

• RHEL8.4 - kernel: fix __clear_user() inline assembly constraints (BZ#2192604)

• RHEL8.6, lockd : oops on nlmsvc_mark_host (BZ#2196386)

• xfs: deadlock in xfs_btree_split_worker (BZ#2196392)

• Intel E810 card unable to create a MACVLAN on interface already configured as SRIOV (BZ#2203217)

• ice: ptp4l cpu usage spikes (BZ#2203287)

• Kernel - Significant performance drop for getrandom system call when FIPS is enabled (compared to RHEL 8.x for all x < 6.z) (BZ#2208130)

• Azure RHEL8: CVM patch list requirement-storvsc patch (BZ#2208601)

• BUG_ON "kernel BUG at mm/rmap.c:1041!" in __page_set_anon_rmap() when vma->anon_vma==NULL (BZ#2211661)

• RHEL 8.6 opening console with mkvterm on novalink terminal fails due to drmgr reporting failure (L3:) (BZ#2212374)

• ESXi RHEL8: Haswell generation CPU are impacted with performance due to IBRS (BZ#2213367)

• Hyper-V RHEL-8: Fix VM crash/hang Issues due to fast VF add/remove events (BZ#2216544)