RHSA-2026:70459 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.

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: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (CVE-2025-39964)

• kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry (CVE-2026-45894)

• kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree (CVE-2026-45959)

• kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)

• kernel: keys: Pin request_key_auth payload in instantiate paths (CVE-2026-63823)

• kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads (CVE-2026-68293)

• kernel: Linux kernel: libceph null pointer dereference leads to denial of service (CVE-2026-68157)

• kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios (CVE-2026-68188)

• kernel: libceph: refresh auth->authorizer_buf{,_len} after authorizer update (CVE-2026-68156)

• kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)

• kernel: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds (CVE-2026-68391)

• kernel: net/mlx5e: macsec: fix use-after-free of metadata_dst on RX SC delete (CVE-2026-72072)

• kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries() (CVE-2026-74518)

Bug Fix(es) and Enhancement(s):

• [Intel 9.8 FEAT] ice: Driver Update [rhel-9.8.z] (JIRA:RHEL-213003)

• RHEL 9.8: Multiuser Kerberized DFS shares fail to mount with UID mount option [rhel-9.8.z] (JIRA:RHEL-254108)

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.