(RHSA-2023:7379) Important: kernel-rt security update

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: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

• kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags (CVE-2023-3812)

• kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)

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

• kernel: netfilter: potential slab-out-of-bound access due to integer underflow (CVE-2023-42753)

• kernel: AMD: Cross-Thread Return Address Predictions (CVE-2022-27672)

• hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (CVE-2022-40982)

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.