Issued at: 2026-08-12
Updated at: 2026-08-12
Advisory content derived from Red Hat RHSA-2026:53329, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: kernel security, bug fix, and enhancement update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: cxl/port: Fix use after free of parent_port in cxl_detach_ep() (CVE-2026-31530)
* kernel: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation (CVE-2025-54518)
* kernel: mm/slab: do not limit zeroing to orig_size when only red zoning is enabled (CVE-2026-64368)
* kernel: net: openvswitch: reject oversized nested action attrs (CVE-2026-64531)
Bug Fix(es) and Enhancement(s):
* Kernel oops after increasing max number of mac addresses of a mlx5 VF [rhel-9.8.z] (JIRA:Rocky Linux-213036)
* Rocky Linux9.4 - s390/pkey: Check length in pkey_pckmo handler implementation [rhel-9.8.z] (JIRA:Rocky Linux-215578)
* Rocky Linux9.4 - s390/pkey: Check length in PKEY_VERIFYPROTK ioctl [rhel-9.8.z] (JIRA:Rocky Linux-215580)
* cifs: periodic IO errors when rename races with lease break (JIRA:Rocky Linux-192999)
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.