RHSA-2024:0431 — Security Advisory

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

Security Fix(es):

• kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)

• kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)

• kernel: IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)

• kernel: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice (CVE-2022-36879)

• kernel: null-ptr-deref vulnerabilities in sl_tx_timeout in drivers/net/slip (CVE-2022-41858)

• kernel: use-after-free caused by invalid pointer hostname in fs/cifs/connect.c (CVE-2023-1195)

• kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)

• kernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to race (CVE-2023-3567)

• kernel: use-after-free in netfilter: nf_tables (CVE-2023-3777)

• kernel: SEV-ES local priv escalation (CVE-2023-46813)

Bug Fix(es):

• kernel-rt: update RT source tree to the latest RHEL-9.0.z Batch 14 (RHEL-17273)

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.