(RHSA-2023:1470) Important: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: tun: avoid double free in tun_free_netdev (CVE-2022-4744)

• ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)

• kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)

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 - zfcp: fix missing auto port scan and thus missing target ports (BZ#2127880)

• Cgroups_v2, when creating new cgroup/container, resets the cpu affinity masks for all usr processes on the system. (BZ#2143766)

• RHEL9.0 - boot: Add secure boot trailer (BZ#2151528)

• kernel-rt-debug: WARNING: possible circular locking dependency detected (&n->list_lock->&p->pi_lock->&lock->wait_lock) (BZ#2160614)

• Support cpuset.sched_load_balance by changing default CPUset directory structure (BZ#2161105)

• RHEL9.0 - s390/kexec: fix ipl report address for kdump (BZ#2166903)

• libgpiod doesn’t seem to work with Interphase gpiochip (BZ#2166956)

• Azure RHEL9 scsi: storvsc: Fix swiotlb bounce buffer leak in confidential VM (BZ#2170227)

Enhancement(s):

• IBM 9.2 FEAT: Upgrade the QETH driver to latest from upstream, e.g. kernel 6.0 (BZ#2166304)

• Intel 9.2 FEAT SPR CPU: AMX: Improve the init_fpstate setup code (BZ#2168382)