RHSA-2026:42550 — 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: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)

• kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071)

Bug Fix(es) and Enhancement(s):

• [rhel-8] WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected - at: vmd_pci_write+0x85/0xe0 - deadlock (JIRA:RHEL-174916)

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.