RHSA-2026:27735 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

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: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

• kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

• kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

• kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

• kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

• kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

• kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323)

• kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

• kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

• kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)

Bug Fix(es) and Enhancement(s):

• [octeon_ep]: Verify VF ID [rhel-9.4.z] (JIRA:RHEL-117605)

• libceph: CEPH_CRYPTO_AES256KRB5 (--key-type aes256k) support [rhel-9.4.z] (JIRA:RHEL-168925)

• [RHEL-9] Performance impact of CVE-2025-38085 [rhel-9.4.z] (JIRA:RHEL-161144)

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.