Red Hat alert RHSA-2026:1148-01 (kernel-rt)

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: hci_event: call disconnect callback before deleting conn
(CVE-2023-53673)

* kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping
(CVE-2025-40154)

* kernel: Linux kernel: vsock vulnerability may lead to memory corruption
(CVE-2025-40248)

* kernel: drm/vmwgfx: Validate command header size against
SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)

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.

This content is licensed under the Creative Commons Attribution 4.0
International License (https://creativecommons.org/licenses/by/4.0/). If you
distribute this content, or a modified version of it, you must provide
attribution to Red Hat Inc. and provide a link to the original.

Original: https://access.redhat.com/security/data/csaf/v2/advisories/2026/rhsa-2026_1148.json