RHSA-2025:17124 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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: ipv6: mcast: extend RCU protection in igmp6_send() (CVE-2025-21759)

• kernel: udp: Fix memory accounting leak. (CVE-2025-22058)

• kernel: md-raid10: fix KASAN warning (CVE-2022-50211)

• kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw (CVE-2025-38200)

• kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate (CVE-2025-38477)

• kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527)

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.