RHSA-2026:52649 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.

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: xen/privcmd: fix double free via VMA splitting (CVE-2026-31787)

• kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CVE-2026-43112)

• kernel: selinux: fix overlayfs mmap() and mprotect() access checks (CVE-2026-46054)

• kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263)

• kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)

• kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)

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.