Issued at: 2026-09-30
Updated at: 2026-09-30
Advisory content derived from Red Hat RHSA-2026:72467, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: kernel-rt security update
Description
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.