(RHSA-2023:5604) Important: kernel security and bug fix update

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

Security Fix(es):

• Kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128)

• kernel: nf_tables: use-after-free in nft_chain_lookup_byid() (CVE-2023-31248)

• kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001)

• kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt() (CVE-2023-35788)

• kernel: hash collisions in the IPv6 connection lookup table (CVE-2023-1206)

• kernel: Spectre v2 SMT mitigations problem (CVE-2023-1998)

• kernel: fbcon: shift-out-of-bounds in fbcon_set_font() (CVE-2023-3161)

• kernel: denial of service problem in net/unix/diag.c (CVE-2023-28327)

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):

• Rhel9.2 - drmgr command is failing [hvcs/PowerVS] (BZ#2213790)

• Wrong hwlat CPU affinity when started from a container. (BZ#2221158)

• cifs: check the lease context if we actually got a lease (BZ#2221160)

• [Hyper-V][RHEL 9]incomplete fc_transport implementation in storvsc causes null dereference in fc_timed_out() (BZ#2230748)

• RHEL-9: WARNING: bad unlock balance detected! (BZ#2232214)

• core: backports from upstream (BZ#2238028)