Red Hat alert RHSA-2023:5604-01 (kernel) [LWN.net]

An update for kernel is now available for Red Hat Enterprise Linux 9.0
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: 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)

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Original: https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5604.json