RHSA-2026:70402 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.

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: Linux kernel Bluetooth: Denial of Service via race condition in hidp_session_thread (CVE-2023-54120)

• kernel: Bluetooth: L2CAP: Fix potential user-after-free (CVE-2023-54214)

• kernel: Bluetooth: btusb: revert use of devm_kzalloc in btusb (CVE-2025-71082)

• kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response (CVE-2026-43334)

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

• kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv (CVE-2026-46043)

• kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing (CVE-2026-46133)

• kernel: Bluetooth: serialize accept_q access (CVE-2026-52918)

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

• kernel: iommu/amd: Fix clone_alias() to use the original device's devid (CVE-2026-53053)

• kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (CVE-2026-53256)

• kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers (CVE-2026-53254)

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

• kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (CVE-2026-63975)

• kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() (CVE-2026-63947)

• kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path (CVE-2026-64534)

• kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap (CVE-2026-64582)

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

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

Bug Fix(es) and Enhancement(s):

• Intel IOMMU: possible circular locking dependency (JIRA:RHEL-243217)

• xfs: repeated xfs_trans_cancel called from xfs_iomap_write_direct (JIRA:RHEL-251578)

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.