RHSA-2026:72467 — 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: fbcon: Set fb_display[i]->mode to NULL when the mode is released (CVE-2025-40323)

• kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)

• kernel: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg (CVE-2026-46230)

• kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB (CVE-2026-46204)

• kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg (CVE-2026-46199)

• kernel: arm64: tlb: Flush walk cache when unsharing PMD tables (CVE-2026-63875)

• kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034)

• kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)

• kernel: Linux kernel: libceph stack out-of-bounds write via crafted OSDMap (CVE-2026-68159)

• kernel: libceph: refresh auth->authorizer_buf{,_len} after authorizer update (CVE-2026-68156)

• kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)

• kernel: drm/amdgpu: Fix context pstate override handling (CVE-2026-68273)

• kernel: perf: Reject exited events as group leaders (CVE-2026-74753)

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.