Important: kernel security, bug fix, and enhancement update
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 [almalinux-9.8.z] (JIRA:AlmaLinux-213036) * AlmaLinux9.4 - s390/pkey: Check length in pkey_pckmo handler implementation [almalinux-9.8.z] (JIRA:AlmaLinux-215578) * AlmaLinux9.4 - s390/pkey: Check length in PKEY_VERIFYPROTK ioctl [almalinux-9.8.z] (JIRA:AlmaLinux-215580) * cifs: periodic IO errors when rename races with lease break (JIRA:AlmaLinux-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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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 [almalinux-9.8.z] (JIRA:AlmaLinux-213036) * AlmaLinux9.4 - s390/pkey: Check length in pkey_pckmo handler implementation [almalinux-9.8.z] (JIRA:AlmaLinux-215578) * AlmaLinux9.4 - s390/pkey: Check length in PKEY_VERIFYPROTK ioctl [almalinux-9.8.z] (JIRA:AlmaLinux-215580) * cifs: periodic IO errors when rename races with lease break (JIRA:AlmaLinux-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.
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2026:53329
- https://access.redhat.com/security/cve/CVE-2025-54518
- https://access.redhat.com/security/cve/CVE-2026-31530
- https://access.redhat.com/security/cve/CVE-2026-64368
- https://access.redhat.com/security/cve/CVE-2026-64531
- https://bugzilla.redhat.com/2460644
- https://bugzilla.redhat.com/2477784
- https://bugzilla.redhat.com/2507213
- https://bugzilla.redhat.com/2507402
- https://errata.almalinux.org/9/ALSA-2026-53329.html