RHSA-2026:39083 — 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: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (CVE-2025-71066)

• kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)

• kernel: net: atm: fix crash due to unvalidated vcc pointer in sigd_send() (CVE-2026-31411)

• kernel: rtmutex: Use waiter::task instead of current in remove_waiter() (CVE-2026-43499)

• kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (CVE-2026-46113)

• kernel: Linux kernel: netfilter: ebtables SNAT target writes to shared memory pages during ARP hardware address rewrite (CVE-2026-53266)

• kernel: futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock (CVE-2026-53166)

• kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359)

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.