RHSA-2026:91489 — 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: xfrm: Duplicate SPI Handling (CVE-2025-39797)

• kernel: Linux kernel: Denial of Service in qla2xxx SCSI driver due to improper command handling after chip reset (CVE-2025-68745)

• kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

• kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)

• kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)

• kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)

• kernel: Linux kernel: xfrm single-frag length not properly limited ()

• kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)

• kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259)

• kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)

• kernel: mac802154: llsec: add skb_cow_data() before in-place crypto (CVE-2026-63831)

• kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() (CVE-2026-63802)

• kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() (CVE-2026-63993)

• kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017)

• kernel: nvmet-auth: validate reply message payload bounds against transfer length (CVE-2026-64319)

• kernel: selinux: check connect-related permissions on TCP Fast Open (CVE-2026-72243)

• kernel: ALSA: usx2y: bound the hwdep mmap fault offset (CVE-2026-74641)

• kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read (CVE-2026-89846)

• kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation ()

Bug Fix(es) and Enhancement(s):

• kernel panics caused by NULL pointer dereferences within octeon_ep_vf [rhel-9.4.z] (JIRA:RHEL-186329)

• BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 [rhel-9.4.z] (JIRA:RHEL-242406)

• Kernel panic reboot node with kernal version 5.14.0-427.68.1.el9_4 [rhel-9.4.z] (JIRA:RHEL-273436)

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.