RHSA-2023:5255 — Security Advisory

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

'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-rt packages provide the Real Time Linux Kernel, which enables fine- tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)

• kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests (CVE-2023-3390)

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

• hw: amd: Cross-Process Information Leak (CVE-2023-20593,zenbleed)

• kernel: ipvlan: out-of-bounds write caused by unclear skb->cb (CVE-2023-3090)

• kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001,ZDI-CAN-20721)

• kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)

• kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)

Bug Fix(es):

• kernel-rt: update RT source tree to the RHEL-8.8.z3 source tree (BZ#2227068)

• pods get restarted due to failed probes (BZ#2227238)