RHSA-2026:81552 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.

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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise (CVE-2026-46309)

• kernel: macsec: fix replay protection at XPN lower-PN wrap (CVE-2026-63925)

• kernel: bpf: Support for hardening against JIT spraying (CVE-2026-64508)

• kernel: x86/bugs: Enable IBPB flush on BPF JIT allocation (CVE-2026-64507)

• kernel: drm/amd/display: set new_stream to NULL after release (CVE-2026-68236)

• kernel: drm/dp/mst: fix buffer overflows in sideband chunk accumulation (CVE-2026-68278)

• kernel: drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid() (CVE-2026-68245)

• kernel: openvswitch: fix GSO userspace truncation underflow (CVE-2026-68123)

• kernel: cifs: validate DFS referral string offsets (CVE-2026-72318)

• kernel: drm/vmwgfx: use check_add_overflow for shader size+offset bound (CVE-2026-80887)

• kernel: nvmet-auth: Synchronize timeout work during SQ teardown (CVE-2026-89970)

• kernel: drm/amdkfd: Add TLB flush after MES queue eviction/suspension (CVE-2026-89811)

• kernel: media: cx231xx: reject geometry changes while the VBI queue is busy (CVE-2026-89894)

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.