RHSA-2023:7431 — Security Advisory

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Telecommunications Update Service.

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: Use-after-free vulnerability in the Linux Kernel traffic control index filter (CVE-2023-1829)

• kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

• 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)

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.