RHSA-2026:82807 — Security Advisory

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

Security Fix(es):

• kernel: openvswitch: defer tunnel netdev_put to RCU release (CVE-2026-31678)

• kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920)

• 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: wifi: mac80211: defer link RX stats percpu free to RCU (CVE-2026-68409)

• kernel: drm/amdgpu/vce: fix integer overflow in image size (CVE-2026-68108)

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

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.